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20fa507a9aefc290c512f58dff04a2c9db5c6479
subsection
3
224
The main results
In this paper we prove three key theorems (Theorems REF , REF and REF ) and a new result concerning universal measurability (Theorem REF ).Essential to our approach is a certain set of assumptions on a spectral triple to be outlined below. The notion of a spectral triple, and all of the corresponding notations are expl...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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6dd6874e1482c32792a0e0cafbf26bd72a30c92c
subsection
4
224
The main results
The definition of dimension in REF .(REF ) is strictly stronger, and we discuss this issue in REF .Condition REF .(REF ) is new and specific to the locally compact situation. Indeed, if \mathcal {A} is unital then REF .(REF ) is redundant, as it follows from REF .(REF ).In order to show that Hypothesis REF .(REF ) is r...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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b86a8d1aa85f4df893a2ce0714ecf65baac23244
subsection
5
224
The main results
The use of locality in noncommutative geometry was pioneered by Rennie in .Definition 1.2.4 A Hochschild cycle c=\sum _{j=1}^m a_0^j\otimes \cdots \otimes a_p^j \in \mathcal {A}^{\otimes (p+1)} is said to be local if there exists a positive element \phi \in \mathcal {A} such that \phi a_0^j=a_0^j for all 1\le j\le m.Fo...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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c803ccf11eeed9f168984d63bd0983bb5b4102df
subsection
6
224
The main results
A new result of this paper, and a crucial component of our proof of Theorem REF , is the following:Theorem 1.2.7 Let 0\le V\in \mathcal {L}_{1,\infty } and let A\in \mathcal {L}_{\infty }. Define the \zeta -function:\zeta _{A,V}(z) := \mathrm {Tr}(AV^{1+z}),\quad \Re (z) > 0.If there exists \varepsilon > 0 such that \...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
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Mathematics
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102b3298a7e754a4d09548af9a93aee075ac8218
subsection
7
224
Context of this paper
Connes' Character Formula dates back to Connes' 1995 paper . There the character theorem was discovered in order to “compute by a local formula the cyclic cohomology Chern character of (\mathcal {A},H,D)”. Connes' work initiated a lengthy and ongoing program to strengthen, generalise and better understand the Character...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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8419d65339c5025e2f9cccdbe89193a706193431
subsection
8
224
Context of this paper
To be precise: the proof relied on an equality between\lim _{s\downarrow 0} \mathrm {Tr}(Z|D|^{-n-s})and\mathrm {Tr}_\omega (Z|D|^{-n})(in the notation of ). In the case where |D|^{-1} is compact this result can be attained using existing techniques from . In the case where |D|^{-1} is not compact the situation is less...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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777710e2b4b5edee30e8254521c3ea1c4d3bd364
subsection
9
224
Structure of the paper
This paper is structured as follows:Chapter is devoted to preliminary definitions and concepts: we introduce the relevant definitions for operator ideals, traces, spectral triples, operator valued integrals and double operator integrals. Chapter provides important technical properties of spectral triples. In Section ...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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261b142489430924c5802fca1f8e50eda3965fa3
subsection
10
224
General notation
Fix throughout a separable, infinite dimensional complex Hilbert space H. We denote by \mathcal {L}_{\infty } the algebra of all bounded operators on H, with operator norm denoted \Vert \cdot \Vert _\infty . For a compact operator T on H, let \lambda (T) := \lbrace \lambda (k,T)\rbrace _{k=0}^\infty denote the sequence...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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2beed6a6dabd1faae1dace82b3ba89bf2559165e
subsection
11
224
Ideals in
For p \in (0,\infty ), we let \mathcal {L}_{p} denote the Schatten-von Neumann ideal of \mathcal {L}_{\infty },\mathcal {L}_p := \lbrace T \in \mathcal {L}_{\infty }\;:\; \mu (T) \in \ell _p\rbracewhere \ell _p is the space of p-summable sequences. As usual, for p \ge 1 the ideal \mathcal {L}_{p} is equipped with the n...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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642e55c9834f7b488a4f919a70faf82939cd26d0
subsection
12
224
Ideals in
If A_k \in \mathcal {L}_{p_k,\infty } for all k = 1,\ldots , n, then A_1A_2\cdots A_n \in \mathcal {L}_{p,\infty }, with an inequality of norms:\Vert A_1A_2\cdots A_n\Vert _{p,\infty } \le c_{p_1,p_2,\ldots ,p_n}\Vert A_1\Vert _{p_{1},\infty }\Vert A_2\Vert _{p_2,\infty }\cdots \Vert A_n\Vert _{p_n,\infty }where c_{p_1...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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55b960124fb706a9fb3002b535b80eefd0d67cf3
subsection
13
224
Ideals in
To be precise, we have that for all A,B \in \mathcal {L}_{1,\infty } if B \prec \prec _{\log } A then\Vert B\Vert _{1,\infty } \le e\Vert A\Vert _{1,\infty }.Indeed, since the sequence \lbrace \mu (k,B)\rbrace _{k=0}^\infty is nonincreasing, for all n \ge 0 we have:\mu (n,B)^{n+1} \le \prod _{k=0}^n \mu (k,B).So if B \...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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3f84131e9a656cf9296d00470dd335e823244de8
subsection
14
224
Traces on
Definition 2.1.1 If \mathcal {I} is an ideal in \mathcal {L}_{\infty }, then a unitarily invariant linear functional \varphi :\mathcal {I}\rightarrow \mathbb {C} is said to be a trace.Here \varphi being “unitarily invariant" means that \varphi (U^*TU) = \varphi (T) for all T \in \mathcal {I} and unitary operators U. E...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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866a8bfb1f0a61cfd1d94c052ef0eca96a2fe1c2
subsection
15
224
Traces on
Combining , for all n \ge 0 we have:\sum _{k=0}^n \mu (k,A+B) \le \sum _{k=0}^n \mu (k,A)+\mu (k,B) \le \sum _{k=0}^{2n+1} \mu (k,A+B).Hence,0 \le \sum _{k=0}^n \mu (k,A)+\mu (k,B)-\mu (k,A+B) \le \sum _{k=n+1}^{2n+1} \mu (k,A+B).However A+B \in \mathcal {L}_{1,\infty }, so there is a constant C > 0 such that for all k...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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497eff0203eef6ae08e11578f5539dd47da54575
subsection
16
224
Traces on
There exist traces on \mathcal {L}_{1,\infty } which fail to be continuous (see ). Every trace on \mathcal {L}_{1,\infty } vanishes on \mathcal {L}_1 (see ).We are mostly interested in normalised traces \varphi :\mathcal {L}_{1,\infty }\rightarrow \mathbb {C}, that is, satisfying \varphi ({\rm diag}(\lbrace \frac{1}{k...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
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Mathematics
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353ec4c2469268088d789ec6af87d3c0c6b61729
subsection
17
224
Spectral triples
A spectral triple is an algebraic model for a Riemannian manifold, defined as follows:Definition 2.2.1 A spectral triple (\mathcal {A},H,D) consists of the following data:a separable Hilbert space H. a (possibly unbounded) self-adjoint operator D on H with a dense domain \mathrm {dom}(D)\subseteq H. a *-subalgebra...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
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Mathematics
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228ed4399dc4513698dacfe92a0c25e771df4b2e
subsection
18
224
Properties of spectral triples
Smoothness of a spectral triple is defined in terms of boundedness of commutators with |D| (see Subsection REF for discussion of this issue). The following results will be known to the expert reader. The notion of smoothness defined in terms of domains of commutators with |D| originates with Connes and is also used in ...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
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Mathematics
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8d80cacd8f8d7eddd1a0cdb59c8b0e2f21eee11e
subsection
19
224
Properties of spectral triples
The kth iterated commutator \delta ^k(TS)|\mathrm {dom}(D^k) is given by:\delta ^k(TS) = \sum _{j=0}^k \binom{k}{j} \delta ^{k-j}(T)\delta ^j(S).Since for all j we have \delta ^j(S) \in \mathrm {dom}_\infty (\delta ) and \delta ^{k-j}(T) \in \mathrm {dom}_\infty (\delta ), the above expression is well defined as an ope...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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29029df4aa0042eff96e09b6489ddbfee1d0d939
subsection
20
224
Properties of spectral triples
Then,DT\xi = \partial (T)\xi + TD\xi .Since T:\mathrm {dom}(D)\rightarrow \mathrm {dom}(D) and \partial (T):\mathrm {dom}(D^2)\rightarrow \mathrm {dom}(D), it follows that DT\xi \in \mathrm {dom}(D) and therefore T:\mathrm {dom}(D^2)\rightarrow \mathrm {dom}(D^2).Now since the operators D and |D| commute on \mathrm {do...
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The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
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Mathematics
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0b73e29e6c5de1bc642eb5696dd1fefe12b545c4
subsection
21
224
Properties of spectral triples
For k=1, by the definition of smoothness we have \partial (a) \in \mathrm {dom}(\delta ) and a \in \mathrm {dom}(\delta )\cap \mathrm {dom}(\partial ), and by definition a:\mathrm {dom}(D)\rightarrow \mathrm {dom}(D). So by Lemma REF it follows that \delta (a) \in \mathrm {dom}(\partial ) and\partial (\delta (a)) = \de...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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f9dd63fe33ae7b3a239e0f4d25d9972a974d9887
subsection
22
224
Properties of spectral triples
If T \in \mathrm {dom}_\infty (\delta ), then T:H_\infty \rightarrow H_\infty since by definition if T \in \mathrm {dom}(\delta ^n) then T:\mathrm {dom}(D^k)\rightarrow \mathrm {dom}(D^k) for all 0 \le k \le n. Moreover since F:\mathrm {dom}(D^n)\rightarrow \mathrm {dom}(D^n) for all n, we also have F:H_\infty \rightar...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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97d77f974842021f4f92dc66e5230e3d74670cd6
subsection
23
224
Properties of spectral triples
Then L(T) \in \mathrm {dom}(\delta ) and\delta (L(T)) = L(\delta (T)).Since \partial (T) \in \mathrm {dom}(\delta ), we have from Lemma REF that \delta (T) \in \mathrm {dom}(\partial )\cap \mathrm {dom}(\delta ) and hence L(\delta (T)) is defined and bounded.The required identity can be checked on \mathrm {dom}(D^2), s...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.48550/arxiv.1107.0805", "end": 1568, "openalex_id": "https://openalex.org/W1607248772", "raw": "Carey A., Gayral V., Rennie A., Sukochev F. Index theory for locally compact noncommutative geometries. Mem. Amer. Math. Soc. 231 (2014), no....
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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9a57f4234146748237d982c53ead99cc8a3605ce
subsection
24
224
Properties of spectral triples
If (\mathcal {A},H,D) is a p-dimensional spectral triple satisfying Hypothesis REF , then [F,a]\in \mathcal {L}_{p,\infty } for all a\in \mathcal {A}.Let \mathcal {A}^{\otimes (p+1)} denote the (p+1)-fold algebraic tensor power of \mathcal {A}. We now define the two important mappings \mathrm {ch} and \Omega .Definitio...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/978-3-662-11389-9", "end": 1644, "openalex_id": "https://openalex.org/W4249867610", "raw": "Loday J. Cyclic homology. volume 301 of Grundlehren der Mathematischen Wissenschaften, Springer-Verlag, 1998.", "source_ref_id": "4fd9...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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bb75bcd9e2c4d7cb35debdefc809508e39e19e71
subsection
25
224
Properties of spectral triples
Consider the following unitary self-adjoint operators on the Hilbert space H_0=\mathbb {C}^2\otimes H defined by:F_0 := \begin{pmatrix} F & P \\ P & -F\end{pmatrix}\\ \Gamma _0 := \begin{pmatrix} \Gamma & 0 \\ 0 & (-1)^{\rm deg}\Gamma \end{pmatrix}.Here, {\rm deg}=1 for even triples and {\rm deg}=0 for odd triples. The...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1016/j.jfa.2003.11.016", "end": 1635, "openalex_id": "https://openalex.org/W2034870188", "raw": "Carey A., Phillips J., Rennie A., Sukochev F. The Hochschild class of the Chern character for semifinite spectral triples. J. Funct. Anal. 2...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c48f582e64c5bd8ba5456a7bd7352aa599821ecf
subsection
26
224
Discussion of smoothness
It is tempting to define smoothness only in terms of \partial , without reference to \delta . One might naively suggest that (\mathcal {A},H,D) is smooth if for all n \ge 0 we have a\cdot \mathrm {dom}(D^n)\rightarrow \mathrm {dom}(D^n) and the nth iterated commutator [D,[D,[\cdots ,[D,a]\cdots ] extends to a bounded o...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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121894fd466081b18714e64a1e2b3e93ac7bb28a
subsection
27
224
Discussion of dimension
As we have defined it, we say that a spectral triple (\mathcal {A},H,D) is p-dimensional if for all a \in \mathcal {A} the operators a(D+i)^{-p} and \partial (a)(D+i)^{-p} are in \mathcal {L}_{1,\infty }.An alternative definition, also used in the literature, is to say that (\mathcal {A},H,D) is p-dimensional if a(D+i)...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/s00220-004-1057-z", "end": 435, "openalex_id": "https://openalex.org/W3101278605", "raw": "Gayral V., Gracia-Bondia J., Iochum B., Schücker T., Varilly J. Moyal planes are spectral triples. Comm. Math. Phys. 246 (2004), no. 3, 569–6...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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4e4efdecf0a0b4762b0e0a6a14aca52daf50b86a
subsection
28
224
Hochschild (co)homology
Hochschild homology and cohomology provide noncommutative generalisations of the notion of differential forms and de Rham currents respectively. A detailed exposition of the theory of Hochschild (co)homology and its relationship with noncommutative geometry may be found in , .Let A be a (possibly non-unital) algebra. T...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/bf02698546", "end": 277, "openalex_id": "https://openalex.org/W2037350910", "raw": "Quillen D. Algebra cochains and cyclic cohomology. Inst. Hautes Études Sci. Publ. Math. 68 (1989), 139–174.", "source_ref_id": "c61e81b4df6b97...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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82186736e1e64d84cc32d6660bcadbaf4e3256ae
subsection
29
224
Hochschild (co)homology
The Hochschild cochain complex is,C_1(A)\xrightarrow{} C_2(A)\xrightarrow{} C_3(A) \xrightarrow{} \cdotswhere the Hochschild coboundary operator b is defined as follows: if \theta :A^{\otimes n}\rightarrow \mathbb {C}, then b\theta :A^{\otimes (n+1)}\rightarrow \mathbb {C} is given on an elementary tensor a_0\otimes a_...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/978-1-4612-0005-5", "end": 1114, "openalex_id": "https://openalex.org/W1552263642", "raw": "Gracia-Bondia J., Varilly J., Figueroa H. Elements of noncommutative geometry. Birkhäuser Boston, Inc., Boston, MA, 2001.", "source_re...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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7e3c11fa0d93fadf25231e05fa4dd6d6b96ec856
subsection
30
224
Weak integration in
This section concerns the theory of “weak operator topology integrals" of operator valued functions. The following definitions, and the subsequent construction of weak integrals, are folklore. We provide suitable references whenever they exist, otherwise we supply a proof. For example, one can look at , and consider th...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 442, "openalex_id": "https://openalex.org/W3038830718", "raw": "Rudin W. Functional analysis. Second edition. International Series in Pure and Applied Mathematics. McGraw-Hill, Inc., New York, 1991.", "source_ref_id": "1ed15...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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36b9bb08dcbb080350e0ea87987b4a0658fae9da
subsection
31
224
Weak integration in
We say that f is integrable in the weak operator topology if\int _{\mathbb {R}}\Vert f(s)\Vert _{\infty }ds < \infty .In particular, for all \xi ,\eta \in H, we have\int _{\mathbb {R}} |\langle f(s)\xi ,\eta \rangle |\,ds < \infty .Hence for a function f satisfying (REF ), we may therefore define the sesquilinear form(...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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e84cb5bbf819e37cfdd951dad796f27eb37c95ee
subsection
32
224
Weak integration in
Let T be the unique bounded linear operator such that x_\xi = T\xi , we now define\int _{\mathbb {R}} f(s)\,ds := T.Due to the above computation, we have that\left\Vert \int _{\mathbb {R}} f(s)\,ds\right\Vert _\infty \le \int _{\mathbb {R}} \Vert f(s)\Vert _{\infty }\,ds.Furthermore, we have that if A \in \mathcal {L}_...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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209caf149f51145b4d9f21693ea21d09d0d5e677
subsection
33
224
Properties of the weak integral
The authors thank Professor Peter Dodds for his assistance with the arguments in this subsection.Lemma 2.3.2 Let s\rightarrow a(s), s\in \mathbb {R}, be continuous in the weak operator topology. If a(s)\in \mathcal {L}_1 for every s\in \mathbb {R} and if\int _{\mathbb {R}}\Vert a(s)\Vert _1ds<\infty ,then a(s) is integ...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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ef4d02bc7c150d00e2968a288fc3c47cddc15f95
subsection
34
224
Properties of the weak integral
We have{\rm Tr}(p_nAp_n)=\int _{\mathbb {R}}{\rm Tr}(p_na(s)p_n)ds.Clearly, {\rm Tr}(p_na(s)p_n)\rightarrow {\rm Tr}(a(s)) as n\rightarrow \infty for every s\in \mathbb {R}. Since the function s \mapsto \mathrm {Tr}(a(s)) is integrable, we can apply the dominated convergence theorem to obtain\int _{\mathbb {R}}{\rm Tr}...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c6c4a0a98dd6d0b55081a86c59e5c854e234ecc3
subsection
35
224
Properties of the weak integral
Then,p|A|p = \int _{\mathbb {R}} pU^*a(s)p\,ds.Thus,\mathrm {Tr}(p|A|p) &\le \int _{\mathbb {R}} |\mathrm {Tr}(pU^*a(s)p)|\,ds\\ &\le \int _{\mathbb {R}} \Vert pU^*a(s)p\Vert _1\,ds.The latter integral converges because \Vert pU^*a(s)p\Vert _1 \le n\Vert a(s)\Vert _\infty . Now,\Vert pU^*a(s)p\Vert _1 &\le \sum _{k=0}^...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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d43b7ed752b47a67c9609149b86599e75dd363e9
subsection
36
224
Double operator integrals
Here, we state the definition and basic properties of double operator integrals. This theory was initiated by the work of Birman and Solomyak , , , and more recent summaries of the theory may be found in , .Heuristically, given self-adjoint operators X and Y with spectra \sigma (X) and \sigma (Y), spectral resolutions ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 207, "openalex_id": "", "raw": "Birman M., Solomyak M. Double Stieltjes operator integrals. In Problems of Mathematical Physics, No. I, Spectral Theory and Wave Processes (Russian), pp. 33–67. Izdat. Leningrad. Univ., Leningrad, 1...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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257bc6bab70db90c1f317edb1192ac964c5194dc
subsection
37
224
Double operator integrals
Namely,T_{\phi _1+\phi _2}^{X,Y}=T_{\phi _1}^{X,Y}+T_{\phi _2}^{X,Y},\quad T_{\phi _1\cdot \phi _2}^{X,Y}=T_{\phi _1}^{X,Y}\circ T_{\phi _2}^{X,Y}.If, in (REF ) we take \Omega to be a one-point set, then \phi (\lambda ,\mu ) = a(\lambda )b(\mu ) andT_{\phi }^{X,Y}(A)=a(X)Ab(Y).
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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ad7d426fce65e3b8f261a3450ebbdbe18ef03f58
subsection
38
224
Fourier transform conventions
We follow the convention that the Fourier transform of a function g \in L_1(\mathbb {R}) is defined by the formula\mathcal {F}(g)(t) := (2\pi )^{-1/2}\int _{\mathbb {R}} g(s)e^{-its}\,dsSo that the inverse Fourier transform is given for h \in L_1(\mathbb {R}) by,\mathcal {F}^{-1}(h)(s) := (2\pi )^{-1/2}\int _{\mathbb {...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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e24b54358eb14bb88ed94a3cdc9e01699ba501d6
subsection
39
224
Spectral Triples: Basic properties and examples
This chapter is primarily concerned with Hypothesis REF . We study the consequences of this hypothesis, and also show that it is satisfied for two important classes of examples.We begin with the proof of Proposition REF , an important prerequisite to the definition of the Chern character (Definition REF ). Next, we sho...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1318, "openalex_id": "", "raw": "Kordyukov Y. Differential operators on manifolds and their applications in geometry and topology. Proceedings of Crimean Autumn School, 2009.", "source_ref_id": "5e9e4bc6ed6b94003247c3cdc1f7c...
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The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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df5bf5a21ad676d335b56fc1a9091a863984ab3b
subsection
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A spectral triple defines a Fredholm module
This section is devoted to the proof of Proposition REF . We prove this in several steps, initially working with the assumption that D has a spectral gap at 0 (i.e., that D has bounded inverse). We later show how this assumption can be removed.Note that if D has a spectral gap at 0, then F = D|D|^{-1} = |D|^{-1}D.Remar...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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ea90ac59db976ca844dea839061424bdb64fa5c8
subsection
41
224
A spectral triple defines a Fredholm module
Similarly,[|D|^{-1},\partial (\delta (a))] &= -|D|^{-1}[|D|,\partial (\delta (a))]|D|^{-1} \\ &= -|D|^{-1}\partial (\delta ^2(a))|D|^{-1}.Additionally, working with operators on H_\infty :|D|^{-1}[D^2,a] &= |D|^{-1}\cdot (D\partial (a)+\partial (a)D)\\ &= F\partial (a)+|D|^{-1}\partial (a)D\\ &= F\partial (a)+\partial ...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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fd3307ac245d542ee3d73f7ce7ce7563c67ba9ac
subsection
42
224
A spectral triple defines a Fredholm module
Hence, the operator |D|^{-1}[D^2,a]|D|^{-p} has extension to an operator in \mathcal {L}_{1,\infty }.On the other hand since |D|^2 = D^2, we have (again, as operators on H_\infty )|D|^{-1}[D^2,a] &= |D|^{-1}[|D|^2,a]\\ &= |D|^{-1}\cdot (|D|\delta (a)+\delta (a)|D|)\\ &= \delta (a)+|D|^{-1}\delta (a)|D|\\ &= \delta (a)+...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.48550/arxiv.1107.0805", "end": 1258, "openalex_id": "https://openalex.org/W1607248772", "raw": "Carey A., Gayral V., Rennie A., Sukochev F. Index theory for locally compact noncommutative geometries. Mem. Amer. Math. Soc. 231 (2014), no....
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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78db4a33a322a475a05aa6561cfbccf91696656b
subsection
43
224
A spectral triple defines a Fredholm module
For every a\in \mathcal {A} and for every 0 < s\le p, we have a|D|^{-s}\in \mathcal {L}_{\frac{p}{s},\infty }, \partial (a)|D|^{-s}\in \mathcal {L}_{\frac{p}{s},\infty }, and \delta (a)|D|^{-s}\in \mathcal {L}_{\frac{p}{s},\infty }.We prove here only the third statement: that \delta (a)|D|^{-s} \in \mathcal {L}_{p/s,\i...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1572, "openalex_id": "", "raw": "Carey A., Phillips J., Rennie A., Sukochev F., The local index formula in semifinite von Neumann algebras. I. Spectral flow. Adv. Math. 202 (2006), no. 2, 451–516.", "source_ref_id": "97ff2be...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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fcf7a576b55147934782b1ff4cedae0d70b4886f
subsection
44
224
A spectral triple defines a Fredholm module
Then (\mathcal {A},H,D_0) is spectral triple, and:(\mathcal {A},H,D_0) is p-dimensional if and only if (\mathcal {A},H,D) is p-dimensional; Let \delta _0 denote the bounded extension of [|D_0|,T], and define \mathrm {dom}_\infty (\delta _0) identically to \mathrm {dom}_\infty (\delta ) with D_0 in place of D. Then we...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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218d53d2cc46e4091dd05cd675cb31a1c115cd87
subsection
45
224
A spectral triple defines a Fredholm module
Similarly, let \delta _1(T) denote the commutator of the bounded extension of |D_0|-|D| with T, \delta _1(T) := [\frac{1}{|D_0|+|D|},T].Then we have the following identity on H_\infty :[D_0,a] = \partial _1(a)+\partial (a).Since \partial (a) and \partial _1(a) are bounded, it follows that [D_0,a] extends to a bounded l...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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f8b754ee243d007222f0776ef81ce05cb43f9daa
subsection
46
224
A spectral triple defines a Fredholm module
So if T \in \mathrm {dom}_\infty (\delta ) we can compute the kth iterated commutator of T with |D_0| as:[|D_0|,[|D_0|,[\cdots ,[|D_0|,T]\cdots ]]] &= (\delta +\delta _1)^k(T)\\ &= \sum _{j=0}^k \binom{k}{j}\delta _1^{k-j}(\delta ^{j}(T))Thus the kth iterated commutator of |D_0| and T has bounded extension, so T \in \m...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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5399c8959d941838e452fb094d59b81b41390c3a
subsection
47
224
A spectral triple defines a Fredholm module
From (REF ), we have that\delta _0^k(a)(D_0+i\lambda )^{-p-1} &= \delta _0^k(a)(D+i\lambda )^{-p-1}\left(\frac{D+i\lambda }{D_0+i\lambda }\right)^{p+1}\\ &= \left(\sum _{l=0}^k \binom{k}{l} \delta _1^{k-l}(\delta ^l(a))(D+i\lambda )^{-p-1}\right)\left(\frac{D+i\lambda }{D_0+i\lambda }\right)^{p+1}.However since |D_0|-|...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1016/j.jfa.2003.11.016", "end": 1314, "openalex_id": "https://openalex.org/W2034870188", "raw": "Carey A., Phillips J., Rennie A., Sukochev F. The Hochschild class of the Chern character for semifinite spectral triples. J. Funct. Anal. 2...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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3e9cfeeb1e91343fa58907df87e905c74dddc110
subsection
48
224
A spectral triple defines a Fredholm module
As an equality of operators on H_\infty , we have:[F,a] &= [D_0|D_0|^{-1},a]\\ &= [D_0,a]|D_0|^{-1}+D_0[|D_0|^{-1},a].Using (REF ),[F,a] = [D_0,a]|D_0|^{-1}-F[|D_0|,a]|D_0|^{-1}.Since the spectral triple (\mathcal {A},H,D_0) satisfies Hypothesis REF and has a spectral gap at 0, we may apply Lemma REF with s = p to conc...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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1c4e24e83468dc9f4900006f81487cea4c69a7ae
subsection
49
224
Restatement of Hypothesis 1.2.1
In this section, we introduce the operator \Lambda , formally defined by:\Lambda (T) = (1+D^2)^{-\frac{1}{2}}[D^2,T].Strictly speaking, \Lambda (T) will be defined to be the bounded extension of the above operator. What is here denoted \Lambda appeared in the unital settings of (there denoted L), (there denoted L_1) a...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/978-3-0348-9102-8_4", "end": 344, "openalex_id": "https://openalex.org/W2112440022", "raw": "Connes A., Moscovici H., The local index formula in noncommutative geometry. Geom. Funct. Anal. 5 (1995), no. 2, 174–243.", "source_r...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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83d61a53743bef8674269ab022f9c65e88dee720
subsection
50
224
Restatement of Hypothesis 1.2.1
We provide a full proof here since to the best of our knowledge no published proof exists in the non-unital setting.The easiest direction to establish is that \mathrm {dom}_\infty (\delta _0)\subseteq \mathrm {dom}_\infty (\Lambda ), as the following Lemma shows:Lemma 3.2.3 We have \mathrm {dom}_\infty (\delta _0) \su...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/978-3-0348-9102-8_4", "end": 1503, "openalex_id": "https://openalex.org/W2112440022", "raw": "Connes A., Moscovici H., The local index formula in noncommutative geometry. Geom. Funct. Anal. 5 (1995), no. 2, 174–243.", "source_...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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a176e12c9480328fd958fb0b10ac57b2483e468d
subsection
51
224
Restatement of Hypothesis 1.2.1
Then for all \xi \in H_\infty we have:[|D_0|,T]\xi = \frac{1}{2}\Lambda (T)\xi + \frac{1}{\pi }\int _0^\infty \lambda ^{1/2} \frac{D_0^2}{(\lambda +D_0^2)^2}\Lambda ^2(T)\frac{1}{\lambda +D_0^2}\xi \,d\lambda .The integral above may be understood as a weak operator topology integral.This is essentially a combination of...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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70c7c1705d62985b17bf78bfbab6fe816bf8d63f
subsection
52
224
Restatement of Hypothesis 1.2.1
Multiplying (REF ) by (1+D^2)\xi , we get:(1+D^2)^{1/2}\xi = \frac{1}{\pi }\int _0^\infty \frac{1+D^2}{1+\lambda +D^2}\xi \frac{d\lambda }{\lambda ^{1/2}}.The above is a convergent Bochner integral in H, since\left\Vert \frac{1+D^2}{1+\lambda +D^2}\xi \right\Vert _H \le \frac{1}{1+\lambda }\Vert (1+D^2)\xi \Vert _H.Now...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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5a97aa712b74fb2df530d12d84c538daa2ae4a2f
subsection
53
224
Restatement of Hypothesis 1.2.1
This will allow us to relate \mathrm {dom}_\infty (\delta _0) to \mathrm {dom}_\infty (\Lambda ). We need to take care to ensure that the relevant version of a Fubini's theorem applies.Lemma 3.2.5 For all m\ge 1, and T \in \mathrm {dom}_\infty (\Lambda ). Then for all \xi \in H_\infty the mth iterated commutator of |D...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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b5148cd6317b0ab49f2677b668a3ad7691f66e33
subsection
54
224
Restatement of Hypothesis 1.2.1
Hence,\delta _0^m = \frac{1}{2^m}\sum _{k=0}^m \binom{m}{k} \left(\frac{2}{\pi }\right)^k\Theta ^k\circ \Lambda ^{m-k}.By the Fubini theorem for Hilbert space valued functions (see ), for all \xi \in H_\infty we have:\Theta ^k(T)\xi = \int _{[0,\infty )^k} \prod _{l=1}^k \frac{\lambda _l^{1/2}D_0^2}{(\lambda _l+D_0^2)^...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.2307/2308567", "end": 426, "openalex_id": "https://openalex.org/W2335062971", "raw": "Dunford N., Schwartz J., Linear Operators, Part I: General theory. John Wiley and Sons, Inc., New York, 1988.", "source_ref_id": "9f30689648e66be...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c2cfbe429b27a34228fc2871433268fb895b0ea1
subsection
55
224
Restatement of Hypothesis 1.2.1
(\mathcal {A},H,D) is p-dimensional, i.e., for every a\in \mathcal {A}, a(D+i)^{-p}\in \mathcal {L}_{1,\infty },\quad \partial (a)(D+i)^{-p}\in \mathcal {L}_{1,\infty }. For every a\in \mathcal {A} and for all k\ge 0, we have \Big \Vert \Lambda ^k(a)(D+i\lambda )^{-p-1}\Big \Vert _1=O(\lambda ^{-1}),\quad \lambda \ri...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.48550/arxiv.1107.0805", "end": 681, "openalex_id": "https://openalex.org/W1607248772", "raw": "Carey A., Gayral V., Rennie A., Sukochev F. Index theory for locally compact noncommutative geometries. Mem. Amer. Math. Soc. 231 (2014), no. ...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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d4c50fb2d67dfdc0227fddfef0c2a0c56813d53a
subsection
56
224
Restatement of Hypothesis 1.2.1
The proof of the second assertion is similar.By the spectral theorem,\left\Vert \prod _{l=1}^k \frac{\lambda _l^{1/2}(1+D^2)}{(1+\lambda _l+D^2)^2}\right\Vert _\infty &\le \prod _{l=1}^k\left\Vert \frac{\lambda _l^{1/2}(1+D^2)}{(1+\lambda _l+D^2)^2}\right\Vert _\infty \\ &\le \prod _{l=1}^k \sup _{t_l\ge 1} \frac{\lamb...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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6411e0161c6c2757bf09bfb5625859a11de1eb60
subsection
57
224
Restatement of Hypothesis 1.2.1
Hence \Vert \delta _0^m(a)(D+i\lambda )^{-p-1}\Vert _1 = O(\lambda ^{-1}).Now using the fact that the operator \left(\frac{D+i\lambda }{D_0+i\lambda }\right)^{p+1} has bounded extension, and\left\Vert \left(\frac{D+i\lambda }{D_0+i\lambda }\right)^{p+1}\right\Vert _\infty &\le \sup _{t \in \mathbb {R}} \left(\frac{t^2+...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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abbc18a30acfe94d2babf9a45b19a0bad2afb918
subsection
58
224
Restatement of Hypothesis 1.2.1
For T \in \mathrm {dom}_\infty (\delta ), we define \alpha (T) and \beta (T) by:\alpha (T) := \frac{|D|}{(D^2+1)^{1/2}}\delta (T),\\ \beta (T) := \frac{1}{(D^2+1)^{1/2}}\delta ^2(T).We can express \Lambda in terms of \alpha and \beta , by applying the Leibniz rule as follows:\Lambda (T) &= (1+D^2)^{-1/2}[|D|^2,T]\\ &= ...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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2f29efb3b803c7c4d2840a4fca61c40916159c86
subsection
59
224
Example: Noncommutative Euclidean space
We now discuss the most heavily studied example of a non-unital spectral triple: noncommutative Euclidean space. Subsection REF covers the definitions of noncommutative Euclidean spaces and their associated spectral triples. Subsection REF is devoted to the proof that these spectral triples satisfy Hypothesis REF .Nonc...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 555, "openalex_id": "", "raw": "Bratteli O., Robinson D. Operator algebras and quantum statistical mechanics. 2. Texts and Monographs in Physics. Springer-Verlag, 1997. Equilibrium states. Models in quantum statistical mechanics."...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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f140bdbc48d64a00ad0bcaf96d3c76ebf1c6ac24
subsection
60
224
Definitions for Noncommutative Euclidean spaces
Our approach to noncommutative Euclidean space is to proceed from the Weyl commutation relations, in line with and . An alternative approach is to use the Moyal product, as in and . We caution the reader that the approach considered here is the "Fourier dual" of the approach in . We briefly cite the required facts need...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 117, "openalex_id": "", "raw": "Bratteli O., Robinson D. Operator algebras and quantum statistical mechanics. 2. Texts and Monographs in Physics. Springer-Verlag, 1997. Equilibrium states. Models in quantum statistical mechanics."...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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842eacc405d183f77ef0bed17720b6449c5ef004
subsection
61
224
Definitions for Noncommutative Euclidean spaces
This is proved in , where a spatial isomorphism is constructed.Theorem 3.3.3 If \det (\theta ) \ne 0, then there is a spatial isomorphismL_\infty (\mathbb {R}^p_\theta )\cong \mathcal {L}_\infty (L_2(\mathbb {R}^{p/2})).We now focus exclusively on the case where \det (\theta ) \ne 0.Definition 3.3.4 The semifinite tra...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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f8f8cb02257379842a21944e23686645dcb45e07
subsection
62
224
Definitions for Noncommutative Euclidean spaces
For r \in [1,\infty ), the space L_r(\mathbb {R}^p_\theta ) is defined by:L_r(\mathbb {R}^p_\theta ) := \lbrace x \in L_\infty (\mathbb {R}^p_\theta )\;:\;\tau _\theta (|x|^r) < \infty \rbrace .The space L_{r}(\mathbb {R}^p_\theta ) is equipped with the norm \Vert x\Vert _{L_r} = \tau _\theta (|x|^r)^{1/r}.Note that L_...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1112/plms.12301", "end": 1878, "openalex_id": "https://openalex.org/W3102193520", "raw": "Levitina G., Sukochev F., Zanin D. Cwikel estimates revisited. submitted manuscript. arXiv:1703.04254", "source_ref_id": "cea3302f306b0deb87b...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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2dedc47fda6de61b586042d144edd2e22798081e
subsection
63
224
Definitions for Noncommutative Euclidean spaces
If x \in L_\infty (\mathbb {R}^p_\theta ), and the operator [D_k^\theta ,x] has bounded extension, then its extension is an element of L_\infty (\mathbb {R}^d_\theta ).Definition 3.3.7 If x \in L_\infty (\mathbb {R}^d_\theta ) is such that [D_k^\theta ,x] has bounded extension, then we denote \partial _kx for the exten...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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3ac6d2ee7b8e312c4318b1be4cfb54b5af53ee3f
subsection
64
224
Definitions for Noncommutative Euclidean spaces
The space W^{\infty ,1}(\mathbb {R}^p_\theta ) is important because it forms a part of our spectral triple for noncommutative Euclidean space.The remainder of this section is devoted to showing that the triple(1_{2^{p/2}}\otimes W^{\infty ,1}(\mathbb {R}^p_\theta ),L_2(\mathbb {R}^{p},\mathbb {C}^{2^{p/2}}),D^\theta )i...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/s00220-004-1057-z", "end": 864, "openalex_id": "https://openalex.org/W3101278605", "raw": "Gayral V., Gracia-Bondia J., Iochum B., Schücker T., Varilly J. Moyal planes are spectral triples. Comm. Math. Phys. 246 (2004), no. 3, 569–6...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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83e3305a6da5920917c43d1d826955597cec1e29
subsection
65
224
Verification of Hypothesis
Now we prove that the triple (REF ) is a spectral triple satisfying Hypothesis REF . In fact it is easier to use Hypothesis REF .Our main reference for this section is . As in that reference, the spaces \ell _1(L_\infty ) and \ell _{1,\infty }(L_\infty ) are defined as follows: Let K = [0,1]^p be the unit p-cube. Then ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1112/plms.12301", "end": 169, "openalex_id": "https://openalex.org/W3102193520", "raw": "Levitina G., Sukochev F., Zanin D. Cwikel estimates revisited. submitted manuscript. arXiv:1703.04254", "source_ref_id": "cea3302f306b0deb87b3...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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e336863a3523e424f190f0d2d4bf9d8c75241e13
subsection
66
224
Verification of Hypothesis
Then there exist constants c_p > 0 and c_p^{\prime } > 0 such that for all x \in W^{p,1}(\mathbb {R}^p_\theta ) we have:(1\otimes x)(D^\theta +i\lambda )^{-p-1} \in \mathcal {L}_1 and \Vert (1\otimes x)(D^\theta +i\lambda )^{-p-1}\Vert _1 \le c_p\frac{\Vert x\Vert _{W^{p,1}}}{\lambda }, (1\otimes x)(D^\theta +i)^{-p}...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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d713faf51d95b4f2770b4f445b1188ef82f89dac
subsection
67
224
Verification of Hypothesis
Since (D^\theta )^2 = 1\otimes \sum _{k=1}^p (D_k^\theta )^2, we have\Lambda (1\otimes x) = (1+(D^\theta )^2)^{-\frac{1}{2}}\cdot (\sum _{k=1}^p1\otimes [(D_k^\theta )^2,x]).Applying the Leibniz rule,[(D_k^\theta )^2,x] &= [D_k^\theta ,x]D_k^\theta +D_k^\theta [D_k^\theta ,x]\\ &= 2D_k^\theta [D_k^\theta ,x]-[D_k^\thet...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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e27d4cbe655fca8651f6d95a73c7a1da92083418
subsection
68
224
Verification of Hypothesis
First we prove that we indeed have a spectral triple.By the definition of W^{\infty ,1}(\mathbb {R}^p), if x \in W^{\infty ,1}(\mathbb {R}^p) then [D^\theta ,1\otimes x] has bounded extension, and therefore 1\otimes x:\mathrm {dom}(D^\theta )\rightarrow \mathrm {dom}(D^\theta ).If x \in W^{\infty ,1}(\mathbb {R}^p_\the...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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8866ff8be342d53766a4f9e536fff6897f5af4f8
subsection
69
224
Verification of Hypothesis
Applying an identical argument to \partial (1\otimes x) yields \partial (1\otimes x) \in \mathrm {dom}_\infty (\Lambda ), and so (1\otimes W^{\infty ,1}(\mathbb {R}^p_\theta ),L_2(\mathbb {R}^d,\mathbb {C}^{2^{p/2}}),D^\theta ) is \Lambda -smooth.We now show that Hypothesis REF .(REF ) holds. Let x \in W^{\infty ,1}(\m...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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3f1a30a2f6daed4efb3763e1eee9a582f6f8f861
subsection
70
224
Verification of Hypothesis
Using the \mathcal {L}_1-norm triangle inequality,\Vert \partial (\Lambda ^m(1\otimes x))(D^\theta +i\lambda )^{-p-1}\Vert _1 \le C_p\sum _{k=1}^p \Vert \Lambda ^m(1\otimes \partial _k x)(D^\theta +i\lambda )^{-p-1}\Vert _1.By assumption, each \partial _k x is in W^{\infty ,1}(\mathbb {R}^p_\theta ), and so by Lemma RE...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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5cc3a8b38601259e4cdb7338420537bb2269d066
subsection
71
224
Example: Riemannian manifolds
The authors wish to thank Professor Yuri Kordyukov for significant contributions to this section, including providing many of the proofs.
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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dbfdaf81b228a62f1414bc9992f26e9e2e3bc9d7
subsection
72
224
Basic notions about manifolds
We briefly recall the relevant definitions for Riemannian manifolds. The material in this subsection is standard, and may be found in for example or . Let X be a second countable p-dimensional complete smooth Riemannian manifold with metric tensor g. Recall that g defines a canonical measure \nu _g on X. The notation L...
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1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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f9b6568a6cbb652cf0d00c4332064e032f131478
subsection
73
224
Basic notions about manifolds
The use of the Hodge-Dirac operator to define spectral triples for arbitrary Riemannian manifolds has previously been studied in , and for related work see .To the best of our knowledge, the main results of this paper, Theorems REF , REF and REF are new in the setting of the Hodge-Dirac operator on arbitrary complete m...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1023/b:kthe.0000021311.27770.e8", "end": 456, "openalex_id": "https://openalex.org/W2024484826", "raw": "Rennie, A. Summability for nonunital spectral triples. K-Theory 31 (2004), no. 1, 71-–100.", "source_ref_id": "de6f97c99706b9f...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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9f9e7d43d993e1dc75d3386d785fb3b7237b22a3
subsection
74
224
Proof of Theorem
The proof proceeds by showing the required Cwikel-type estimates for the case of a torus: X = \mathbb {T}^p with the flat metric. We then deduce the general case by an argument involving local coordinates.We define the p-torus as \mathbb {T}^p := \mathbb {R}^p/\mathbb {Z}^p. The space \mathbb {T}^p is a smooth p-dimens...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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b281040d87b3eceed36094c5feaf922fe2f196d9
subsection
75
224
Proof of Theorem
Hence, the L_2-norms corresponding to \nu _g and \nu _{g_0} are equivalent.Sobolev spaces on \mathbb {T}^p – and more generally on a compact Riemannian manifold – are defined following :Definition 3.4.4 Let g be a metric on \mathbb {T}^p, and for j=1,\ldots ,p we let \frac{\partial }{\partial x_j} denote the differenti...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1007/s00209-004-0718-0", "end": 379, "openalex_id": "https://openalex.org/W2031482444", "raw": "Lawson B., Michelsohn M., Spin geometry. Princeton Mathematical Series, 38. Princeton University Press, Princeton, NJ, 1989.", "source_...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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8880ece5fc1e65597e51f0ad34cc22589902718c
subsection
76
224
Proof of Theorem
Then the operatorD_0(D_g+i)^{-1}defined initially on \Omega (\mathbb {T}^p) has bounded extension to L_2\Omega (\mathbb {T}^p,g) (or equivalently L_2\Omega (\mathbb {T}^p,g_0)).By the definition of the Sobolev norm \Vert \cdot \Vert _{H^1\Omega (\mathbb {T}^p,g)}, for all v \in H^1\Omega (\mathbb {T}^p,g) we have:\Vert...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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a4a4fcfddf6fd52cad3d1a80dcd5f1ff733bc7d5
subsection
77
224
Proof of Theorem
For \lambda \rightarrow \infty , we have \Vert (D_g+i\lambda )^{-1}\Vert _{\mathcal {L}_{p+1}(L_2\Omega (\mathbb {T}^p,g))} = O(\lambda ^{-\frac{1}{p+1}}).Part (REF ) follows immediately from Lemma REF and Lemma REF .REF .Now we prove (REF ). First we compute (D_0+i\lambda )(D_g+i\lambda )^{-1} (working on the dense d...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1023/b:kthe.0000021311.27770.e8", "end": 1103, "openalex_id": "https://openalex.org/W2024484826", "raw": "Rennie, A. Summability for nonunital spectral triples. K-Theory 31 (2004), no. 1, 71-–100.", "source_ref_id": "de6f97c99706b9...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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910d25594b193f5730866ecc51afce2e55a5e3b6
subsection
78
224
Proof of Theorem
By identifying the edges of [0,1]^p, we may view h as a continuous function h:U\rightarrow \mathbb {T}^p.We define three smooth “cut-off" functions \phi _1,\phi _2,\phi _3 compactly supported in h(U), defined so that for each j = 1,2,3 we have 0\le \phi _j \le 1, andfor all x \in U, \phi _1(h(x))f(x) = f(x), we have ...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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aed5f7c9281cf2eadd668b43812011fa7bd21b84
subsection
79
224
Proof of Theorem
\end{array}\right.}By construction, V induces an isometry from L_2\Omega (\mathrm {supp}(\psi _2),g)\rightarrow L_2\Omega (\mathrm {supp}(\phi _2),g_1), andVV^* &= M_{\chi _{\mathrm {supp}{\phi _2}}},\\ V^*V &= M_{\chi _{\mathrm {supp}{\psi _2}}}.We also have that if j = 1,2 thenM_{\phi _j}V = VM_{\psi _{j}}.We use the...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
[ -0.04364919289946556, 0.02745625749230385, -0.04584691300988197, -0.0006968036759644747, -0.00956924632191658, 0.01703234203159809, 0.006719076074659824, 0.03827698528766632, 0.052470602095127106, 0.0015853355871513486, -0.04364919289946556, -0.04251980781555176, 0.06434440612792969, 0.006...
7015a450e8b720a53296ea1daf58f2404685059b
subsection
80
224
Proof of Theorem
Hence (working on \Omega _c(X)):(D_g+i)M_{\psi _2}V^*PV &= V^*(D_{g_1}+i)M_{\phi _2}PV\\ &= V^*(D_{g_1}+i)M_{\phi _1}(D_{g_1}+i)^{-1}M_{\phi _1}V\\ &= V^*([D_{g_1},M_{\phi _1}](D_{g_1}+i)^{-1}M_{\phi _1}+M_{\phi _1}^2)V.Now recalling that D_{g_1} is a local operator, we have [D_{g_1},M_{\phi _1}] = [D_{g_1},M_{\phi _1}...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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be37fd7fbab93baed90fc8ac2e6710a4d3576b0a
subsection
81
224
Proof of Theorem
We also use the same cut-off functions \phi _1, \phi _2 and \phi _3, and \psi _1,\psi _2,\psi _3.In place of the operators P and Q, we introduce P_{\lambda } and Q_{\lambda } given by:P_{\lambda } &= M_{\phi _1}(D_{g_1}+i\lambda )^{-1}M_{\phi _1}\\ Q_{\lambda } &= M_{\phi _2}(D_{g_1}+i\lambda )^{-1}M_{\phi _2}.Followin...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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734dd654e0392fb8160206d188b533d6723cedaf
subsection
82
224
Proof of Theorem
Then,M_f(D_g+i)^{-j-1} &= M_{\phi }M_f(D_g+i)^{-1}\cdot (D_g+i)^{-j}\\ &= -M_{\phi }[(D_g+i)^{-1},M_f](D_g+i)^{-j}+M_{\phi }(D_g+i)^{-1}M_f(D_g+i)^{-j}\\ &= M_{\phi }(D_g+i)^{-1}[D,M_f](D_g+i)^{-j-1}+M_{\phi }(D_g+i)^{-1}M_f(D_g+i)^{-j}\\ &= M_{\phi }(D_g+i)^{-1}[D,M_f]M_{\phi }(D_g+i)^{-j-1}+M_{\phi }(D_g+i)^{-1}M_f(D...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
[ -0.03863096609711647, 0.03164321556687355, -0.04717494174838066, -0.017118461430072784, 0.010222254320979118, 0.011435193009674549, 0.027874713763594627, 0.010008654557168484, 0.0567258819937706, -0.006411794573068619, -0.03780708461999893, 0.0004157558723818511, -0.01310584507882595, 0.00...
b713004dd181ba3ea779279b689db9ea3c9f83df
subsection
83
224
Proof of Theorem
Then,M_f(D_g+i\lambda )^{-j-1} &= M_{\phi }\cdot M_f(D_g+i\lambda )^{-1}(D_g+i\lambda )^{-j}\\ &= -M_{\phi }[(D_g+i\lambda )^{-1},M_f](D_g+i\lambda )^{-j}\\ &\quad +M_{\phi }(D_g+i\lambda )^{-1}M_f(D_g+i\lambda )^{-j}\\ &= M_{\phi }(D_g+i\lambda )^{-1}[D,M_f]M_{\phi }(D_g+i\lambda )^{-j-1}\\ &\quad +M_{\phi }(D_g+i\lam...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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18e1d0ea9b99170d9d37442878ba6e2a5521c601
subsection
84
224
Proof of Theorem
By Lemma REF , the spectral triple (\mathcal {A},H,D_0) satisfies Hypothesis REF . Since |D_0| \ge 1, we have that \Vert |D_0|^{-1}\Vert _\infty \le 1.Let us establish Condition REF .(REF ). We haveB^pA=|D_0|^{-p}a^2.Since (\mathcal {A},H,D) is p-dimensional, we have that |D_0|^{-p}a \in \mathcal {L}_{1,\infty }, and s...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
[ -0.09461097419261932, 0.037996988743543625, -0.010384317487478256, -0.050357457250356674, -0.029573559761047363, 0.015687109902501106, 0.046084702014923096, 0.04693925380706787, 0.0459321029484272, -0.005596544593572617, -0.025224506855010986, 0.035097621381282806, 0.047824323177337646, -0...
3051725bb7cf4444ac26640033636d5738e5d883
subsection
85
224
Proof of Theorem
Using (REF ), we have:[B,A^{\frac{1}{2}}]=[|D_0|^{-1},a]=-|D_0|^{-1}\delta _0(a)|D_0|^{-1}.By Theorem 9 in , we have|D_0|^{-1}\delta _0(a)|D_0|^{-1}\prec \prec \delta _0(a)|D_0|^{-2}.By Lemma REF , we have\delta _0(a)|D_0|^{-2}\in \mathcal {L}_{\frac{p}{2},\infty }.Since the norm in the space \mathcal {L}_{\frac{p}{2},...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1090/pspum/087/01428", "end": 183, "openalex_id": "https://openalex.org/W2278675715", "raw": "Sukochev F. On a conjecture of A. Bikchentaev. Spectral analysis, differential equations and mathematical physics: a festschrift in honor of Fr...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c173893a0698a8ac4530ad497fc6fbb44f7a5ce1
subsection
86
224
Proof of Theorem
Therefore, for all z \in \mathbb {C} with \Re (z) > 0:a^{2z}a_0^j=a^{2z}\chi _{\lbrace 1\rbrace }(a)a_0^j=1^{2z}a_0^j=a_0^j.Recall that \Omega (c) = \sum _{j=0}^m \Gamma a_0^j\partial (a_1^j)\cdots \partial (a_p^j). Since a commutes with \Gamma , we have for all \Re (z) > 0,a^{2z}\Omega (c) = \Omega (c).Let A=a^2 and B...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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1349f0e2b4add57fbad4fad4b50689d1141ba51b
subsection
87
224
Proof of Theorem
It has just been demonstrated thatz\rightarrow {\rm Tr}(\Omega (c)V^z)admits an analytic continuation to the set \lbrace \Re (z)>1-\frac{1}{p}\rbrace \setminus \lbrace 1\rbrace , with a simple pole at z=1 and the corresponding residue being \mathrm {Ch}(c).By Theorem REF , we therefore have\varphi (\Omega (c)V)=\mathrm...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
[ -0.073447085916996, 0.013233296573162079, -0.024360254406929016, 0.0006682471139356494, 0.011073537170886993, -0.00848640501499176, 0.036204591393470764, 0.01534726656973362, 0.012752502225339413, -0.020193370059132576, -0.020834429189562798, -0.014820681884884834, 0.01885019801557064, 0.0...
909b35f9b827ee1fa651c51c586c3e19467ddccf
subsection
88
224
Proof of Theorem
For \varepsilon > 0, set f_{\varepsilon }(t)=f(t)e^{-\varepsilon ^2t^2}, t\in \mathbb {R}. Then,f_\varepsilon ^{\prime }(t) &= (f^{\prime }(t)-2\varepsilon ^2tf(t))e^{-\varepsilon ^2t^2},\\ f_{\varepsilon }^{\prime \prime }(t) &= (f^{\prime \prime }(t)-4\varepsilon ^2tf^{\prime }(t)+(4t\varepsilon ^4-2\varepsilon ^2)f(...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1515/crelle.2009.006", "end": 1012, "openalex_id": "https://openalex.org/W2964079016", "raw": "Potapov D., Sukochev F. Unbounded Fredholm modules and double operator integrals. J. Reine Angew. Math. 626 (2009), 159–185.", "source_r...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
[ -0.05006767064332962, 0.04817602410912514, -0.03166986256837845, -0.005930471234023571, 0.007330139167606831, -0.0071623316034674644, 0.00007055544847389683, 0.016490906476974487, 0.005507138557732105, -0.0023264228366315365, -0.058641113340854645, 0.00867259968072176, -0.00940485019236803, ...
6dac2439e244093513b122182fac349d3db3d7a5
subsection
89
224
Proof of Theorem
We have\Big \Vert \chi _{[0,N]}(|D|)[f_{\epsilon }(|D|),x]\chi _{[0,N]}(|D|)\Big \Vert _{r,\infty }\le \frac{c_{abs}r}{r-1}\Vert \delta (x)\Vert _{r,\infty }.Since as \varepsilon \rightarrow 0, we have that f_{\varepsilon } converges uniformly to f on the set [0,N], we have that: As \epsilon \rightarrow 0, we have\chi ...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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17bb02f08d0b92fae9959e08dd1946dbdaae970d
subsection
90
224
Proof of Theorem
Using (REF ), we have on H_\infty :B^{q-2}[B,A] &= |D_0|^{\frac{2-q}{3}}[|D_0|^{-\frac{1}{3}},a^4]\\ &= -|D_0|^{\frac{1-q}{3}}[|D_0|^{\frac{1}{3}},a^4]|D_0|^{-\frac{1}{3}}\\ &= -[|D_0|^{\frac{1}{3}},|D_0|^{\frac{1-q}{3}}a^4|D_0|^{-\frac{1}{3}}].By Lemma REF , we have\Vert B^{q-2}[B,A]\Vert _1\le c_{abs}\Vert [|D_0|,|D_...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c3e8a35648eab0e2330e6f8620148d89adc23f58
subsection
91
224
Proof of Theorem
We have:[B,A^{\frac{1}{2}}] &= [|D_0|^{-\frac{1}{3}},a^2]\\ &= -|D_0|^{-\frac{1}{3}}[|D_0|^{\frac{1}{3}},a^2]|D_0|^{-\frac{1}{3}}\\ &= -[|D_0|^{\frac{1}{3}},|D_0|^{-\frac{1}{3}}a^2|D_0|^{-\frac{1}{3}}].By Lemma REF , we have\Vert [B,A^{\frac{1}{2}}]\Vert _{\frac{3}{2},\infty }\le c_{\mathrm {abs}}\Vert [|D_0|,|D_0|^{-\...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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a1b75331cc66897e3b3d77a9ce8c694cb85f613c
subsection
92
224
Proof of Theorem
We haveB^{q-2}[B,A] &= |D_0|^{\frac{2-q}{3}}[|D_0|^{-\frac{1}{3}},a^4]\\ &= -|D_0|^{\frac{1-q}{3}}[|D_0|^{\frac{1}{3}},a^4]|D_0|^{-\frac{1}{3}}\\ &= -[|D_0|^{\frac{1}{3}},|D_0|^{\frac{1-q}{3}}a^4|D_0|^{-\frac{1}{3}}].By Lemma REF , we have\Vert B^{q-2}[B,A]\Vert _1\le c_{abs}\Vert [|D_0|,|D_0|^{\frac{1-q}{3}}a^4|D_0|^{...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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8a566afef0b581d98377556fbabb34811841ec54
subsection
93
224
Proof of Theorem
We may compute on H_\infty :[B,A^{\frac{1}{2}}] &= [|D_0|^{-\frac{1}{3}},a^2]\\ &= -|D_0|^{-\frac{1}{3}}[|D_0|^{\frac{1}{3}},a^2]|D_0|^{-\frac{1}{3}}\\ &= -[|D_0|^{\frac{1}{3}},|D_0|^{-\frac{1}{3}}a^2|D_0|^{-\frac{1}{3}}].Therefore using Lemma REF , we have\Vert [B,A^{\frac{1}{2}}]\Vert _{3,\infty }\le c_{abs}\Vert [|D...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c75c010f9563f23bc1873da99c046ea7c2fa5434
subsection
94
224
Proof of Theorem
Since c is local, we may choose 0 \le a \in \mathcal {A} such that aa_0^j = a_0^j for all j.By exactly the same argument as in the p>2 case, we can show that for all \Re (z) > 0:a^{4z}\Omega (c)=\Omega (c).We let A=a^4 and B=(1+D^2)^{-\frac{1}{6}} as in Lemmas REF and REF .We have that:\mathrm {Tr}(\Omega (c)B^zA^z) &=...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c0824903a2618752635ff3aeb45e77a188c703bf
subsection
95
224
Proof of Theorem
So by rescaling the argument, we can equivalently say that the functionz\mapsto \mathrm {Tr}(\Omega (c)V_1^z)has analytic continuation to the set \lbrace z\;:\;\Re (z) > 2/3\rbrace \setminus \lbrace 1\rbrace with a simple pole at 1 with corresponding residue \mathrm {Ch}(c).Thus by Theorem REF , for any continuous norm...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
[ -0.07171023637056351, 0.007487616967409849, -0.012907843105494976, 0.006873502861708403, 0.021833479404449463, -0.022138629108667374, 0.027295663952827454, 0.020750196650624275, 0.02111637592315674, -0.022153886035084724, -0.010512416251003742, -0.006347118876874447, 0.01916341669857502, 0...
790a43e1a302b4c09abb9777ff898a81d6dd4429
subsection
96
224
Proof of Theorem
Thus,\varphi (\Omega (c)B^6A^6) = \mathrm {Ch}(c).So \varphi (a^{12}\Omega (c)(1+D^2)^{-1}) = \mathrm {Ch}(c). Since a^{12}\Omega (c) = \Omega (c), this completes the proof for the case p=2.
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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c83fb407085f718b051add975868c9631923dd4b
subsection
97
224
Asymptotic of the heat trace
In this chapter we complete the proof of Theorem REF . This will require some delicate computations exploiting Hochschild homology.For the remainder of this chapter, we assume that (\mathcal {A},H,D) is a spectral triple satisfying Hypothesis REF . Furthermore we will need the following auxiliary assumption:Hypothesis ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "10.1016/j.jfa.2003.11.016", "end": 1240, "openalex_id": "https://openalex.org/W2034870188", "raw": "Carey A., Phillips J., Rennie A., Sukochev F. The Hochschild class of the Chern character for semifinite spectral triples. J. Funct. Anal. 2...
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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ce7743773c732439a84449aaf886ffb1cf0bdffb
subsection
98
224
Combinatorial expression for
Combinatorial expressionWe begin this section with the introduction of a new set of multilinear maps:Definition 4.1.1 Let {A} \subseteq \lbrace 1,2,\ldots ,p\rbrace . We define the multilinear map \mathcal {W}_{A}:\mathcal {A}^{\otimes (p+1)}\rightarrow \mathcal {L}_{\infty } by:\mathcal {W}_{{A}}(a_0\otimes a_1\otime...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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be0aa008ce45eaeaac043cdb6138d9b54d22999e
subsection
99
224
Combinatorial expression for
However first we need a Lemma which constitutes the core of the proof of Theorem REF . Most of this section is devoted to the proof of the following lemma, which is split into various parts.Lemma 4.1.2 Let (\mathcal {A},H,D) be a smooth spectral triple where D has a spectral gap at 0. For all c\in (\mathcal {A}+\mathb...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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e7abe442c4fffd9b35b3f6cd8cb9e9a4cd3b8e7b
subsection
100
224
Combinatorial expression for
Here we have |{B}| = |{A}|-1, and\mathcal {W}_{{A}}(c)|D|^{p-|{A}|} &= \mathcal {W}_{{B}}(c^{\prime })\delta (a_p)|D|^{p-1-|{B}|}\\ &= \left(\mathcal {W}_{{B}}(c^{\prime })|D|^{p-1-|{B}|}\right)\left(|D|^{-p+1+|{B}|}\delta (a_p)|D|^{p-1-|{B}|}\right)The first factor in the right hand side has bounded extension by the i...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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bc7f25789f3d6615c9b8e929b2f0047e11aeb138
subsection
101
224
Combinatorial expression for
\end{array}\right.}We also define the multilinear map \mathcal {P}_{{A}}:\mathcal {A}^{\otimes (p+1)}\rightarrow \mathcal {L}_{\infty } by\mathcal {P}_{{A}}(a_0\otimes \cdots \otimes a_p) := \Gamma a_0\prod _{k=1}^p y_k(a_k)where for each 1\le k \le p and a \in \mathcal {A},y_k(a) := {\left\lbrace \begin{array}{ll} \de...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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657ebc4eedb7288a10b40fa116fe91c014ebce91
subsection
102
224
Combinatorial expression for
If {A} = \lbrace 1\rbrace , then\mathcal {R}_{{A}}(c) &= \Gamma a_0F\delta (a_1)\\ \mathcal {P}_{{A}}(c)F^{|{A}|} &= \Gamma a_0\delta (a_1)F.So,\left(\mathcal {R}_{{A}}(c)-(-1)^{n_{{A}}}\mathcal {P}_{{A}}(c)\cdot F^{|{A}|}\right)\cdot |D| &= \Gamma a_0(F\delta (a_1)-\delta (a_1)F)|D|\\ &= \Gamma a_0[F,\delta (a_1)]|D|\...
{ "cite_spans": [] }
1803.01551
The Connes character formula for locally compact spectral triples
[ "Fedor Sukochev", "Dmitriy Zanin" ]
[ "math.OA" ]
2,018
en
Mathematics
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