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f02f43881b4822d1981d16f6514a2dfa19b4fb4e
subsection
42
153
Floer homology from cycles of correspondences
Extend \mathbb {Y}(t) arbitrarily to a \tilde{Y}\in T_J (M_1,\dots , M_l), then replace \tilde{\mathbb {Y}} by \mathbb {Y}=\chi \tilde{\mathbb {Y}} where \chi is a bump function supported near (s,t). When the support of \chi is small enough, one will then have \int _{[0,1]\times }{\langle \eta , \mathbb {Y}\circ Du \ci...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 5443, 510, 71, 6, 125458, 5125, 1723, 18, 16, 61799, 416, 538, 47, 3675, 112, 8152, 73, 384, 454, 1375, 594, 115187, 4, 41872, 15464, 7, 276, 141, 247, 91995, 390, 1369, 1861, 24854, 10666, 47391, 373, 2676, 32354, 8060, 297, 43573, ...
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6a6ba58985d47a6115a5aefe4164f7efe2c2f536
subsection
43
153
Floer homology from cycles of correspondences
Checking that this is a chain map is left to the reader.An object \mathsf {O} of {C} is, according to Definition REF , a finite collection (indexed by some set A) each of whose elements is a sequence of symplectic manifolds (M_1^\alpha ,\dots , M_{l^\alpha }^\alpha ) and a cycle of Lagrangian correspondences L_{i,i+1}^...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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385ecae21ba002bedb9bcb6e139a2c8d8c3f311a
subsection
44
153
Morphisms
A morphism in {C} is an isomorphism class of `cobordisms', where a cobordism is a matched collection of fibrations. The latter is defined to be a formidable assembly of data{F}=(S,\Gamma ; E,\pi ,\Omega ; Q; \lbrace \zeta _\alpha \rbrace _{\alpha \in \pi _0(\partial S)}),consisting of the following components:A quilted...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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592fc4306ea191e5519ef31e7bc1fc6f73b7803d
subsection
45
153
Morphisms
The minus sign is crucial (though to which factor it is attached is not).Component (iii):Definition 3.8 A Lagrangian matching condition Q \rightarrow \Gamma for E is a sub-fibre bundle Q\subset E_\Gamma , proper over \Gamma , such that (i) \Omega _\Gamma |_Q=0, and (ii) the fibres of Q have half the dimension of those ...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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6b048aba6f8fdaf932bdb6536b170aa6dd4c341c
subsection
46
153
Morphisms
The picture to have in mind is that one can cut the quilted surface (S,\Gamma ) (and the fibrations lying above it) along a collection of circles transverse to \Gamma ; sewing is just the inverse operation. For the sewing of fibrations, it is convenient to be able to assume that the LHFs are flat, hence (by Lemma REF )...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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5e608232195a92aa701d0ce3fa7b0494e5444389
subsection
47
153
Morphisms
Form the fibre productE_\Gamma : = (E|_{\Gamma ^+}) \times _{\Gamma } (E|_{\Gamma ^-}) .It becomes an LHF over \Gamma when we endow it with the two-form \Omega _\Gamma obtained as the restriction of the form (-\Omega ^+) \oplus \Omega ^- on (E|_{\Gamma ^+}) \times (E|_{\Gamma ^-}) to its subspace E_\Gamma . The minus s...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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3176c7bb40b41c57fdcd3fd16bfe3a137d476044
subsection
48
153
Morphisms
A morphism in the category {C} is defined as an isomorphism class of cobordisms.The definition of `isomorphism' here is the obvious one, involving diffeomorphisms of the base surfaces and two-form-preserving bundle-maps; it is left to the reader to elaborate.Morphisms are composed by concatenation of cobordisms. The pi...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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af27d5e745d8390f0c20d7aac5723aa73b749615
subsection
49
153
Cobordism-maps
We now turn to the construction of maps on Floer homology from matched collections of fibrations.We now turn to the construction of maps on Floer homology from matched collections of fibrations.
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0ec17e7417df9540a1aedb4b8eaa93d01b163522
subsection
50
153
Cylindrical ends; almost complex structures
Let {F} be a matched collection of fibrations. We elongate the base surface S to a surface \widehat{S} with cylindrical ends. To do this, choose for each boundary component (\partial S)_\alpha a boundary collar e_\alpha \colon (-1,0]\times S^1 \hookrightarrow S such that e_\alpha ^{-1}(\Gamma ) is a union of line segme...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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fd1fbbaa9390fad234a96994f39eec88d8a4169e
subsection
51
153
Cylindrical ends; almost complex structures
We say J is adapted if it is partly compatible everywhere, fully compatible over the end, and translation-invariant (after shortening the end by increasing T).(d) When the cylindrical ends of \widehat{S} have seams \widehat{\Gamma } =(-\infty , -T) \times \lbrace z_1,\dots , z_l \rbrace \subset (-\infty , -T) \times S^...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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50648227ace845d87b13ab2aca21e0313a49b53b
subsection
52
153
Cylindrical ends; almost complex structures
The Lagrangian matching condition Q extends to a Lagrangian matching condition \widehat{Q} over \widehat{\Gamma } in a unique way; indeed, the requirement that it be isotropic implies that the extension must be obtained by symplectic parallel transport along the ends of \widehat{\Gamma }.Definition 3.10 (a) Given an L...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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830cccfd1896f66b9db1cbc78ea056ed92b2e035
subsection
53
153
Holomorphic sections
The ends of the surface \widehat{S} are cylindrical, with seams \widehat{\Gamma }. Fix a complex structure j on \widehat{S} (inducing \hat{j} on \widehat{S}_\Gamma ) which is standard over the ends, as in Definition REF , and consider the space (\widehat{E}_\Gamma )=(\widehat{E}_\Gamma ,j) of j-adapted almost complex s...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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29bcd7cfe9d29ef524a604b20187bacd3c536b98
subsection
54
153
Holomorphic sections
Given an adapted almost complex structure J, the moduli space of J-holomorphic sections is the subspace{Z}(\nu ;J) := \lbrace u\in {B}(\nu ): J\circ Du - Du\circ j = 0 ,\; \operatorname{\mathsf {A}}(u)<\infty \rbrace \subset {B}^p(\nu ) .Thus {Z}(\nu ;J) = \operatorname{\bar{\partial }}_J^{-1}(0) where \operatorname{\b...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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8619f5ebc7cc57f1938c60152ac46e9c42960053
subsection
55
153
Holomorphic sections
Moreover, (U_\alpha ^{\prime }, U_\alpha ^{\prime } \cap \widehat{\Gamma }^{\prime }) is the image of an embedding of pairs whose domain is one of the following: \begin{} \item [(i)] \left(D^2,\emptyset \right); \item [(ii)] \left(S^1\times [0,\infty ),\emptyset \right) or \left(S^1\times (-\infty ,0], \emptyset \right...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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53255ace4f1cccbd0320d4f290b4fb6b02546293
subsection
56
153
Holomorphic sections
The operator D_{u,J} reduces to one of shape \frac{d}{ds} + L, where L=i \frac{d}{dt}\colon L^2_1([0,1/m], r; \Lambda _0,\Lambda _1)\rightarrow L^2([0,1/m],r) is formally self-adjoint and invertible. The operator \frac{d}{ds} + L\colon L^2_1(\times [0,1/m], r;\Lambda _0,\Lambda _1) \rightarrow L^2(\times [0,1/m], r) is...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1312, "openalex_id": "", "raw": "A. Floer, The unregularized gradient flow of the symplectic action, Comm. Pure Appl. Math. 41 (1988), no. 6, 775–813.", "source_ref_id": "f2482ca914f6a8073f81e0816c70e2e2549d588b", "sta...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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f5f0125a92f5c5871d6bc4633d3cccf9f3b86302
subsection
57
153
Holomorphic sections
Fix a complex structure j on \widehat{S} (inducing \hat{j} on \widehat{S}_\Gamma ) which is standard over the ends, as in Definition REF , and consider the space (\widehat{E}_\Gamma )=(\widehat{E}_\Gamma ,j) of j-adapted almost complex structures in \widehat{E}_\Gamma . Over each end e, J is eventually translation inva...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c2e7cd34a4b811c19cd2f82cd2fdbc912165a6ca
subsection
58
153
Holomorphic sections
Given an adapted almost complex structure J, the moduli space of J-holomorphic sections is the subspace{Z}(\nu ;J) := \lbrace u\in {B}(\nu ): J\circ Du - Du\circ j = 0 ,\; \operatorname{\mathsf {A}}(u)<\infty \rbrace \subset {B}^p(\nu ) .Thus {Z}(\nu ;J) = \operatorname{\bar{\partial }}_J^{-1}(0) where \operatorname{\b...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0961708c6515a7787652b42725df8d821f395235
subsection
59
153
Holomorphic sections
Moreover, (U_\alpha ^{\prime }, U_\alpha ^{\prime } \cap \widehat{\Gamma }^{\prime }) is the image of an embedding of pairs whose domain is one of the following: \begin{} \item [(i)] \left(D^2,\emptyset \right); \item [(ii)] \left(S^1\times [0,\infty ),\emptyset \right) or \left(S^1\times (-\infty ,0], \emptyset \right...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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f399818dc81a19aba067b3f021c26e659f6ba64a
subsection
60
153
Holomorphic sections
The operator D_{u,J} reduces to one of shape \frac{d}{ds} + L, where L=i \frac{d}{dt}\colon L^2_1([0,1/m], r; \Lambda _0,\Lambda _1)\rightarrow L^2([0,1/m],r) is formally self-adjoint and invertible. The operator \frac{d}{ds} + L\colon L^2_1(\times [0,1/m], r;\Lambda _0,\Lambda _1) \rightarrow L^2(\times [0,1/m], r) is...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1312, "openalex_id": "", "raw": "A. Floer, The unregularized gradient flow of the symplectic action, Comm. Pure Appl. Math. 41 (1988), no. 6, 775–813.", "source_ref_id": "f2482ca914f6a8073f81e0816c70e2e2549d588b", "sta...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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ae2076c9a11c57e6faa518f5b5b787aafb0bc911
subsection
61
153
Definition of the cobordism-maps
Let \mathsf {O}_- and \mathsf {O}_+ be objects in {C}, and {F} a matched collection of fibrations defining a cobordism between them. Let J_-^v and J^v_+ be regular complex structures defining the Floer complexes \operatorname{CF}_*(\mathsf {O}_\pm ;J^v_\pm ). Also pick J \in (\widehat{E}_\Gamma ; \lbrace J^v_\pm \rbrac...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1724, "openalex_id": "", "raw": "D. Salamon, Lectures on Floer homology, Symplectic geometry and topology (Park City, UT, 1997), 143–229, IAS/Park City Math. Ser., 7, Amer. Math. Soc., Providence, RI, 1999.", "source_ref_id"...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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de59ecf4e2bfb955006a8d5f2636ddf9ac10e069
subsection
62
153
Definition of the cobordism-maps
Given cycles of Hamiltonian chords \nu _- and \nu _+ for the respective objects, there is a locally constant action function \mathsf {A} on \widetilde{{Z}}(\nu _-,\nu _+;J) with sub-level sets \widetilde{{Z}}( \nu _-,\nu _+;J)_{\le c}:= \mathsf {A}^{-1}((-\infty ,c]). Assuming we are in the normalised monotone (or stro...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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98880f046ea51e1ec00c08a569f5e25fcfab3f3e
subsection
63
153
Quantum cap product
Assuming N monotone, the quantum cap productH^p(N;\Lambda _R) \otimes _{\Lambda _R} \operatorname{HF}_*(\mu )\rightarrow \operatorname{HF}_{*-p}(\mu ), \quad c\otimes x \mapsto c \frown x,could in principle be defined by means of cocycles for any ordinary cohomology theory in which one can make sense of transversality....
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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af8be362090239018a8a3b17e4a221b400776abf
subsection
64
153
Quantum cap product
By counting the points of fixed energies in the fibre products (REF ) one defines the matrix entries in a linear map\tau \frown \cdot \colon \operatorname{CF}_*(\mu )\rightarrow \operatorname{CF}_{*-p}(\mu ).The usual trajectory-breaking argument demonstrates that\partial (\tau \frown x)= (\partial \tau )\frown x + \ta...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 586, "openalex_id": "", "raw": "D. McDuff and D. Salamon, Introduction to symplectic topology, 2nd edition, Oxford Mathematical Monographs, Oxford University Press, New York, 1998.", "source_ref_id": "972baa0feeddd389d9d2985...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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b26abfed381a62b585a5827d5b5c59bc67d061e2
subsection
65
153
Quantum cap product
For \nu _\pm \in \operatorname{{H}}(\operatorname{T}(\mu )), one has the `continuation map' moduli spaces \widetilde{{Z}}(\nu _-,\nu _+;J), and evaluation maps\colon \widetilde{{Z}}(\nu _-,\nu _+;J) \rightarrow N,\quad u\mapsto u(0,[0]).Given any countable collection of smooth simplices \sigma ^k\colon \Delta ^{d(k)}\r...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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5571ebf0b720988b50224c34d0700942d8b299cc
subsection
66
153
Setting up the isomorphism
The maps \rho ^! and e(V)\frown \cdot in the Gysin sequence (REF ) fit into the field theory described in the previous section. Let \widehat{V}^{\prime }= (\mathrm {id}_{M_-}\times \mu ) \widehat{V} \subset M_- \times N. As promised in the introduction, we will construct an isomorphism\Phi \colon H \operatorname{\maths...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c54151e3fa475795c5d65fe608c0809586e96a12
subsection
67
153
Global angular cochains
The Euler class of an oriented sphere bundle vanishes when pulled back to the total space:\rho ^*e(V)=0.When V is an \operatornamewithlimits{\mathrm {SO}}(k+1)-bundle, this can be seen very simply: \rho ^*V has a tautological section. A more precise statement, valid for any smooth, R-oriented fibre bundle whose fibres ...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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f936cfa607466ec722a6f8bc71c7087575701a08
subsection
68
153
Global angular cochains
Recall that the transgression \tau is the homomorphismd_{k+1}^{0,k}\colon E^{0,k}_{k+1}\rightarrow E^{k+1,0}_{k+1}in the Leray–Serre spectral sequence (E^{p,q}_r, d_r^{p,q} ) of a fibre bundle \pi \colon E\rightarrow B. One thinks of it as a map from a subgroup of H^k(F;R) to a quotient of H^{k+1}(B;R). The cochain int...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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338033b0a56593893ec38201ee2d9e6e7512c5e2
subsection
69
153
Defining
The map C\rho is associated with a matched collection of fibrations over a quilted surface depicted schematically in Figure REF . [Figure: The base of the matched pair of fibrations underlying C\rho .]The base surface S is a finite cylinder; its elongation \widehat{S} (see (REF )) an infinite cylinder. To be precise, w...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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fdf1a0cd65b97953f26344f20e65430161c374ec
subsection
70
153
Defining
\end{equation} We denote this submanifold by Vp to emphasise that it lies in the product of the fibres over p S. Symplectic parallel transport along the arc , starting at p, carries Vp to a Lagrangian Vx(Px)-Qx for each x. Write \begin{equation} \widehat{\mathsf {V}} =\bigcup _{x\in \widehat{\Gamma }} {\widehat{V}_x}. ...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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663a0a1a434606ec54363bd4fe4c1359822e36fb
subsection
71
153
Defining
To be precise, we set \widehat{S}= 4i, andS=\lbrace [z]\in \widehat{S}: |\operatorname{Re}(z)| \le 2 \rbrace ,then define q\colon \widehat{S} as the quotient map. The arc \widehat{\Gamma }\subset S is the union of two line segments and a circular arcPedantically, we ought to smooth the joins between the line segments a...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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a9c3ff10f7589879db347acae4b77c36aa4cf3be
subsection
72
153
Defining
Write \begin{equation} \widehat{\mathsf {V}} =\bigcup _{x\in \widehat{\Gamma }} {\widehat{V}_x}. \end{equation} \begin{} The map C\rho is the cobordism-map (\ref {cob map}) associated with the matched pair of fibrations (P,Q, \widehat{\mathsf {V}}). Thus it counts finite-action pairs (u,v), where u is a section of \pi ...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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1d64f30994b54a2a7b5bce1d7c87833ea0b91328
subsection
73
153
The composite
The gluing (or sewing) theorem for fixed-point Floer homology expresses the composite C\rho \circ Ce in terms of a sewed fibration, as in Figure REF . Namely, Ce is defined using the LHF (R,\pi _R,\Omega _R) over \widehat{S} defined above; C\rho using a matched pair of LHFs over \widehat{S}. We can glue these together,...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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826a00f3a8377e16c6ead010962941151453639c
subsection
74
153
The nullhomotopy
The nullhomotopy H promised in (REF ) will be constructed as the concatenation of two homotopies, H_1 and H_2. The first homotopy, H_1, arises by moving the marked point from p^{\prime } to p, as in Figure REF .The matrix entries of this homotopy are defined as counts of isolated triples \lbrace (t,u,v)\rbrace , where ...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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902ee177751a3c0d5961082268a25a9cb37ad0c2
subsection
75
153
The nullhomotopy
We have an evaluation map ev_1 \colon {Z}_k(x,y) \rightarrow \widehat{V}_1. We can choose the complex structures on P and Q so as to make ev_1 transverse to the codimension k cycle \rho ^! Z in \widehat{V}, by an argument explained by Seidel , for example.It follows that \mathsf {pr}_N \circ ev_1 is transverse to Z. Th...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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7870c0384bef87820a808f9e7abc4acfcda1918d
subsection
76
153
The nullhomotopy
The first homotopy, H_1, arises by moving the marked point from p^{\prime } to p, as in Figure REF .The matrix entries of this homotopy are defined as counts of isolated triples \lbrace (t,u,v)\rbrace , where (u,v) is a pair of pseudo-holomorphic sections as before, t \in [-1,0], and u(q(t) ) \in \phi _{t}(Z), where \p...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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e63c76bb8a14008d80f9e5ca6e288c407f2d3566
subsection
77
153
The nullhomotopy
We can choose the complex structures on P and Q so as to make ev_1 transverse to the codimension k cycle \rho ^! Z in \widehat{V}, by an argument explained by Seidel , for example.It follows that \mathsf {pr}_N \circ ev_1 is transverse to Z. This projected evaluation map is the same as the evaluation map ev^v_1, where ...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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f73a2d918fbb89573dd449fd361d7e564ccd956c
subsection
78
153
Lagrangian intersections
The chain complexes defined in the previous section are well-defined up to homotopy-equivalence, and the maps between them are well-defined up to homotopy. The resulting homology modules are independent of choices up to isomorphism (in fact, canonical isomorphism) and the maps between them are canonical. However, the p...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
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Mathematics
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a2a3bbd2671dea1c9cc05c42a20461cec5ab4279
subsection
79
153
Lagrangian intersections
Fix a Riemannian metric on V, and let W_\epsilon \subset W be the subset of vertical cotangent vectors of length <\epsilon .For small \epsilon , there is a symplectomorphism \mathrm {nd}(V) \rightarrow W^\epsilon extending the zero-section V\rightarrow W_\epsilon ; we may therefore consider W_\epsilon as a neighbourhoo...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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7d97768a779a0f214f9cc7fb8b1a88cd9b55cb99
subsection
80
153
Lagrangian intersections
The Hamiltonian flow \phi _{\hat{m}} with respect to the canonical form -d\lambda _{can} is `vertical', and moves the zero section to the graph of dm.Now consider functions H\in C^\infty (M) of shape \chi \cdot H_m, where \chi is a cutoff function for the neighbourhood W_\epsilon of V, andH_m = \sum _{\bar{x} \in \oper...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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73882d7261ad8a31732800b15093cb96e4e7bc79
subsection
81
153
Lagrangian intersections
Now, \phi _{\chi H_m} preserves the fibre \rho ^{-1}(\rho (x)), and (identifying the fibre with (T^*F)_{< \epsilon } via t_{\rho (\bar{x})}) it acts as \phi _{\hat{m}}. So for \phi _{\chi H_m} (y) to be a point of V, we must have x \in \operatorname{crit}(m) and x = \phi _{\chi H_m}(y)= y. Thus (x,\rho (x))\in \operato...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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7e07a5807cbd101af4cbec41e1e0e38b66060ec5
subsection
82
153
Lagrangian intersections
It is still true that \phi _{K_{l,m}}-|\cdot |^2 preserves the fibre \rho ^{-1}(\rho (x)) when \rho (x)\in \operatorname{Fix}(\mu ). By the same argument as before, one sees that for any intersection point (x,\rho (x))\in \widehat{V}\cap (\phi _{K_{l,m}^{\prime } } \times \mu )\widehat{V} one has \rho (x)\in \operatorn...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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9931d8d9e25823f90da5f75d02efbdf7dab8fe1c
subsection
83
153
Lagrangian intersections
To begin, \widehat{V} \cap (\mathrm {id}_{M_-} \times \mu )\widehat{V} is the set of pairs (x,\rho x) such that x\in V and \rho x \in \operatorname{Fix}(\mu ):\mathsf {pr}_1 \left( \widehat{V} \cap (\mathrm {id}_{M_-} \times \mu )\widehat{V}\right) = \rho ^{-1}( \operatorname{Fix}(\mu ) ).After a C^k-small Hamiltonian ...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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a7dad0c60c262355d0cc21a4f46c9725a67d23ff
subsection
84
153
Lagrangian intersections
It is convenient to choose the connection form \alpha to be flat over a neighbourhood U= \bigcup _{\bar{x}\in \operatorname{Fix}(\mu )}{U_{\bar{x}}} of the finite set \operatorname{Fix}(\mu ). The Hamiltonian connection is then flat over U, hence (after shrinking U) symplectically trivial. For each \bar{x}\in \operator...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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77e79b8911bf6fd019d7d8621abe5c7733d343d5
subsection
85
153
Lagrangian intersections
In particular, we may arrange that | \rho (y) - \rho \circ \phi _{\chi H_m}(y) | \le C/4 for all y\in W_\epsilon .Take a point (x,\rho (x)) = (\phi _{H_m} (y), \mu \rho (y)) \in \widehat{V} \cap (\phi _{\chi H_m} \times \mu )\widehat{V}. Then \rho (x)\in \operatorname{supp}(\eta _{\bar{x}}) for some \bar{x}\in \operato...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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5428e74ffa2e897eb4ae64aa6babcd24781814b7
subsection
86
153
Lagrangian intersections
The functions K_{l,m} are Morse; the critical points lie on V, and project to the critical points of l on N.Lemma 4.5 Lemma REF remains true when H_m is replaced by K^{\prime }_{l,m} or K_{l,m}.The proof is similar but a little more complicated.Given \epsilon >0, we can find a constant C^{\prime } so that if \mathrm {d...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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2f24277fc249d86d7689f1db8ce8b0702fb9f0d4
subsection
87
153
Lagrangian intersections
Then \rho (x)=\rho (y) and x\in \operatorname{crit}(m) as before.Proposition 4.6 When m is small in C^0 and has precisely two critical points, \rho induces a two-to-one map \beta \colon \widehat{V} \cap (\phi _{K_{l,m}} \times \mu )\widehat{V} \rightarrow \operatorname{Fix}(\mu ).Immediate from the previous lemma.Rema...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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477ef238ec47aef8dd7aae0fa8dc8031e4352a4e
subsection
88
153
The definition of
Recall our standing hypothesis that F is has a Morse function with precisely two critical points. Thus, by an observation of Reeb (see ), F is homeomorphic to S^k.Conversely, by results due to Smale—the h-cobordism theorem and the non-existence of exotic 5-spheres —any F homeomorphic to S^k with k\ne 4 has such a Morse...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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subsection
89
153
On
We continue to work on W \cong T^*_v V (REF ). Notice that the connection \alpha induces isomorphismsT^*W & \cong R^*(T^*V) \oplus R^* (T^*_v V) \\ & \cong R^*(T^*_v V)\oplus \left( R^* (T_v^* V) \oplus R^* \rho ^*(T^*N) \right).We shall consider almost complex structures I which have a block decompositionI = \left[ \b...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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de6070cc253eef8421b7856febb2281d0a977387
subsection
90
153
On
Notice that the connection \alpha induces isomorphismsT^*W & \cong R^*(T^*V) \oplus R^* (T^*_v V) \\ & \cong R^*(T^*_v V)\oplus \left( R^* (T_v^* V) \oplus R^* \rho ^*(T^*N) \right).We shall consider almost complex structures I which have a block decompositionI = \left[ \begin{array}{ccc} 0 & - \mathrm {id}& 0 \\ \math...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c9d8f1944cd934c959c08cd310032ec5b4a6431f
subsection
91
153
On the matched pair of fibrations
Recall that \pi _P\colon P\rightarrow B is a trivial M-bundle, whilst \pi _Q\colon Q\rightarrow C is an N-bundle. We endowed Q with the closed 2-form \Omega _Q which makes it a flat LHF with monodromy \mu around the puncture. We gave P=B\times M the closed 2-form \Omega _P = \omega _M + d( K dt) , where t is the vertic...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 85763, 6, 1434, 683, 22796, 436, 118201, 335, 1927, 686, 289, 276, 28025, 133, 4, 217982, 2737, 41872, 19, 2396, 54969, 313, 541, 22, 246, 155738, 4720, 5037, 87849, 30482, 10, 49878, 339, 66882, 678, 22460, 41684, 53, 561, 10932, 70, ...
[ 0.088623046875, 0.0091552734375, 0.1885986328125, 0.12646484375, 0.0174407958984375, 0.08392333984375, 0.088623046875, 0.1142578125, 0.06353759765625, 0.11474609375, 0.04840087890625, 0.114501953125, 0.169189453125, 0.13671875, 0.00921630859375, 0.01031494140625, 0.172607421875, 0....
9364689364c0e16c77b7bb03934c6878f0e5c58d
subsection
92
153
On the matched pair of fibrations
We gave P=B\times M the closed 2-form \Omega _P = \omega _M + d( K dt) , where t is the vertical (or imaginary) coordinate on B and K\in C^\infty (M); in Lemma REF we observed that this LHF is also flat. Remember also that we built the Lagrangian matching condition \widehat{\mathsf {V}} using the symplectic parallel tr...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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[ 0.0270843505859375, 0.0966796875, 0.05242919921875, 0.1357421875, 0.1617431640625, 0.144775390625, 0.1507568359375, 0.08367919921875, 0.17236328125, 0.1563720703125, 0.15234375, 0.0152435302734375, 0.1240234375, 0.1409912109375, 0.0716552734375, 0.0963134765625, 0.1015625, 0.055480...
5547fdf3b995c6318457027838caf94d03635217
subsection
93
153
Tweaking the almost complex structures
The definition of {J}(M,Q) suffers from a predictable defect: it is so stringent that {J}(M,Q) might not contain any regular almost complex structures. To get around this, we will take some (J_M, J_Q)\in (M,Q) and tweak it slightly, without disturbing the features which are useful to us.Consider the region U_B = \lbrac...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 581, 80934, 111, 1375, 8152, 594, 4, 2737, 16, 134729, 7, 1295, 10, 92054, 2886, 72104, 12, 83, 221, 79315, 2517, 13648, 959, 70541, 2499, 20324, 39555, 27140, 45646, 2046, 10932, 1221, 5646, 3060, 454, 821, 73, 77488, 13, 344, 161549, ...
[ 0.0023193359375, 0.2474365234375, 0.05743408203125, 0.283447265625, 0.15380859375, 0.2103271484375, 0.1494140625, 0.271728515625, 0.01336669921875, 0.238037109375, 0.08251953125, 0.1104736328125, 0.023651123046875, 0.271240234375, 0.225341796875, 0.304931640625, 0.01715087890625, 0...
2a5fbd99f0c7f976c92babab838d9c02cbead9b1
subsection
94
153
Tweaking the almost complex structures
The quotient map qS=Z is injective on (UB) and maps it to C; let UCC denote q(UB). We shall write also for the induced map UBUC, which is a diffeomorphism, mapping UB to UC by the identity map. Notice that the closure UC wraps all the way around the cylinder: one has q(1+i )UCUB. [Figure: Schematic of S, pictured as a...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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61df9491b09f41e511772a8d6ccdc6da61347801
subsection
95
153
Low-energy pseudo-holomorphic sections
We consider pairs (u,v) where u is a J_P-holomorphic section of \pi _P, v a J_Q-holomorphic section of \pi _Q, and (u(x),v(x))\in \widehat{V}_x when x lies in \widehat{\Gamma }. We first identify a subset of the J_P-holomorphic sections of \pi _P. The latter is, by construction, a trivial fibration, and a J_P-holomorph...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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[ 0.0251922607421875, 0.12890625, 0.284912109375, 0.0496826171875, 0.1878662109375, 0.035919189453125, 0.257568359375, 0.003143310546875, 0.2147216796875, 0.020721435546875, 0.1236572265625, 0.057373046875, 0.1337890625, 0.04046630859375, 0.090087890625, 0.1912841796875, 0.028381347656...
f62bfc5d2954333e788bc1607d0d0fc145f40a7a
subsection
96
153
Low-energy pseudo-holomorphic sections
But from Lemma REF , when J_M\in (M;V), \nabla K is everywhere tangent to V.We can precisely identify the moduli space ^{\mathrm {grad}}(J_M,J_Q) of pairs (u,v)\in {Z}(J_M,J_Q), where u is a gradient section and v is horizontal: there is a canonical identification^{\mathrm {grad}}(J_M,J_Q) \cong \bigcup _{x\in \operato...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 4966, 1295, 636, 18023, 9069, 919, 3229, 821, 454, 594, 73, 74, 856, 6, 76, 7119, 341, 83, 219743, 25269, 2517, 47, 310, 831, 134995, 538, 135812, 17055, 14, 32628, 41872, 125458, 42, 39, 8961, 1375, 2737, 16, 80836, 7, 15, 34, 4, ...
[ 0.0828857421875, 0.0416259765625, 0.0506591796875, 0.2034912109375, 0.109130859375, 0.1787109375, 0.0184783935546875, 0.1595458984375, 0.040557861328125, 0.1505126953125, 0.1336669921875, 0.0595703125, 0.2392578125, 0.003753662109375, 0.0986328125, 0.1751708984375, 0.158447265625, ...
b0334fce70469bc76516ce17593062e00d4605a8
subsection
97
153
Low-energy pseudo-holomorphic sections
Working in P\rightarrow B, with the symplectic form \Omega _P+ \pi _P^*(ds\wedge dt), and considering the natural linearised symplectic connection in \nabla ^u in u^*T^{\mathrm {v}}P, we haveD_{u}^*D_{u} X &= \frac{1}{2} \nabla ^{u*} \nabla ^{u} X + \frac{J}{2} F_\nabla (\partial _s,\partial _t) X , && X\in C^\infty _c...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 581, "openalex_id": "", "raw": "D. McDuff and D. Salamon, Introduction to symplectic topology, 2nd edition, Oxford Mathematical Monographs, Oxford University Press, New York, 1998.", "source_ref_id": "972baa0feeddd389d9d2985...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 27985, 23, 436, 54969, 118201, 335, 954, 33209, 49086, 3173, 670, 87849, 683, 1328, 1434, 8353, 1639, 6468, 24243, 429, 18, 179635, 6083, 192617, 52021, 94878, 76, 7119, 34, 75, 618, 334, 642, 765, 397, 1193, 132076, 997, 1375, 563, 158...
[ 0.08642578125, 0.035552978515625, 0.1070556640625, 0.037109375, 0.11474609375, 0.131103515625, 0.07080078125, 0.1351318359375, 0.169677734375, 0.15625, 0.01068115234375, 0.1805419921875, 0.1298828125, 0.168212890625, 0.1451416015625, 0.004913330078125, 0.0648193359375, 0.0127563476...
76e5caaad15c5915941daec1324391576fdc6f50
subsection
98
153
Low-energy pseudo-holomorphic sections
But \ker \nabla _v^*=0 because K is Morse–Smale, and \ker \nabla _u^*=0 because \mu is non-degenerate.Lemma 4.10 The number \# ^{\mathrm {grad}}(\bar{x}, x)_0 of isolated gradient-type pairs asymptotic to \bar{x}\in \operatorname{Fix}(\mu ) and to x\in \widehat{V}\cap \widehat{V}^{\prime } is equal to 1 if \rho (x)=\b...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 4966, 1728, 76, 7119, 334, 1639, 145407, 6637, 341, 83, 5919, 184, 1104, 49100, 4, 136, 6, 41872, 101, 34, 8353, 561, 351, 112, 48281, 67, 18023, 1398, 963, 14012, 4904, 24854, 125458, 42, 39, 8961, 47391, 132, 1299, 425, 8152, 1022, ...
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40103f1b27fe653f7e978e2ca0ee79df5759b4aa
subsection
99
153
Low-energy pseudo-holomorphic sections
Notice also that the set U^{\prime }:=\overline{U_B\cup U_C}\subset \widehat{S} has the property that any pair of horizontal sections (u,v) over U^{\prime } (or rather, over its image in \widehat{S}_\Gamma ), satisfying the matching condition \widehat{\mathsf {V}}, extends to an element of ^{\mathrm {grad}}(J_M,J_Q). B...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 548, "openalex_id": "", "raw": "P. Seidel, A long exact sequence for symplectic Floer cohomology, Topology 42 (2003), no. 5, 1003–1063.", "source_ref_id": "66f33142e3fc0935dbe66c96537d89637d4f000a", "start": 319 } ...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 438, 24494, 5423, 345, 8353, 114654, 5465, 2256, 1062, 571, 33874, 441, 22144, 3509, 113458, 2943, 294, 57266, 2499, 80836, 124001, 40059, 34, 4, 334, 645, 29569, 36557, 40407, 14858, 35431, 125458, 420, 856, 65042, 12830, 8961, 1375, 2737,...
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2faa8c0bf95bffc42ac5194ccd4b1fbee891d9c6
subsection
100
153
Low-energy pseudo-holomorphic sections
It is better to replace u_n by \tilde{u}_n, so that Floer's equation (REF ) holds, because (\tilde{u}_n,v_n) is subject to a Lagrangian matching condition which is independent of n. Moreover, and satisfies a version of Floer's equation (REF ) whose coefficients converge in C^\infty as n\rightarrow \infty . Gromov–Floer...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1099, "openalex_id": "", "raw": "S. K. Donaldson, Floer homology groups in Yang–Mills theory, Cambridge Tracts in Mathematics, 147. Cambridge University Press, Cambridge, 2002.", "source_ref_id": "a37896244714dfc5e30d1134828...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 11522, 91995, 75, 454, 19, 390, 3675, 112, 34, 38699, 56, 25, 5490, 2320, 11766, 919, 16401, 334, 28368, 239, 30962, 34958, 14858, 214, 35431, 41371, 653, 40407, 11389, 552, 4240, 11044, 74789, 313, 46632, 939, 14854, 30464, 365, 94928, ...
[ 0.1187744140625, 0.137451171875, 0.1082763671875, 0.06976318359375, 0.113037109375, 0.003875732421875, 0.169189453125, 0.218017578125, 0.08282470703125, 0.1915283203125, 0.1785888671875, 0.002685546875, 0.17333984375, 0.004486083984375, 0.0888671875, 0.18310546875, 0.109130859375, ...
6a2f115af8464347b07cc02f2b1c9970e0f17be9
subsection
101
153
Low-energy pseudo-holomorphic sections
The deformation operator {D}=D_{(0,w)}\Phi is given by{D} (t, \dot{w}) = D_0 \dot{w} + \frac{t}{2} ( \beta \circ J - J\circ \beta ) \circ dw \circ j ,where \beta = (d/dt)(\alpha _t)|_{t=0}. But \beta (T^{\mathrm {h}}E_\Gamma )=0, and so if w=(u_\infty ,v_\infty ) is our pair of horizontal sections then ( \beta \circ J ...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 581, 8, 5037, 2320, 39933, 397, 1369, 454, 2389, 434, 45689, 14, 83, 34475, 390, 18, 15464, 391, 997, 132076, 304, 59865, 82063, 821, 87364, 1647, 71, 64, 13384, 14612, 145407, 127, 647, 36557, 2174, 148, 34, 46632, 334, 939, 80836, 1...
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29327e882a49486554e5df98f3ae588f7a72472e
subsection
102
153
Low-energy pseudo-holomorphic sections
This contradicts regularity of (u_n,v_n).Thus A is an isomorphism, and there exist coordinates in which \kappa is given by the map\times ^k \rightarrow ^k, \quad (\lambda , x)\mapsto \lambda x,and \mathsf {pr}_2 \colon \times ^k \rightarrow corresponds to the projection {Z}^{\mathrm {par}}\rightarrow . The strand \time...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 3293, 2304, 61669, 7, 20324, 2481, 34, 454, 19, 334, 6378, 62, 83, 142, 13882, 178851, 8780, 32316, 176866, 90, 161, 7495, 34475, 22288, 70141, 92, 91526, 6492, 85, 1022, 62346, 2940, 10287, 304, 22796, 42518, 13452, 1830, 1511, 2500, 3...
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ebe0c1e943cd15194083372475fd08ff10e21314
subsection
103
153
Low-energy pseudo-holomorphic sections
But from Lemma REF , when J_M\in (M;V), \nabla K is everywhere tangent to V.We can precisely identify the moduli space ^{\mathrm {grad}}(J_M,J_Q) of pairs (u,v)\in {Z}(J_M,J_Q), where u is a gradient section and v is horizontal: there is a canonical identification^{\mathrm {grad}}(J_M,J_Q) \cong \bigcup _{x\in \operato...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 4966, 1295, 636, 18023, 9069, 919, 3229, 821, 454, 594, 73, 74, 856, 6, 76, 7119, 341, 83, 219743, 25269, 2517, 47, 310, 831, 134995, 538, 135812, 17055, 14, 32628, 41872, 125458, 42, 39, 8961, 1375, 2737, 16, 80836, 7, 15, 34, 4, ...
[ 0.0828857421875, 0.0416259765625, 0.0506591796875, 0.2034912109375, 0.109130859375, 0.1787109375, 0.0184783935546875, 0.1595458984375, 0.040557861328125, 0.1505126953125, 0.1336669921875, 0.0595703125, 0.2392578125, 0.003753662109375, 0.0986328125, 0.1751708984375, 0.158447265625, ...
11aae31eca2d8b850417d06bf6d07c0b822502d5
subsection
104
153
Low-energy pseudo-holomorphic sections
Working in P\rightarrow B, with the symplectic form \Omega _P+ \pi _P^*(ds\wedge dt), and considering the natural linearised symplectic connection in \nabla ^u in u^*T^{\mathrm {v}}P, we haveD_{u}^*D_{u} X &= \frac{1}{2} \nabla ^{u*} \nabla ^{u} X + \frac{J}{2} F_\nabla (\partial _s,\partial _t) X , && X\in C^\infty _c...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 581, "openalex_id": "", "raw": "D. McDuff and D. Salamon, Introduction to symplectic topology, 2nd edition, Oxford Mathematical Monographs, Oxford University Press, New York, 1998.", "source_ref_id": "972baa0feeddd389d9d2985...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 27985, 23, 436, 54969, 118201, 335, 954, 33209, 49086, 3173, 670, 87849, 683, 1328, 1434, 8353, 1639, 6468, 24243, 429, 18, 179635, 6083, 192617, 52021, 94878, 76, 7119, 34, 75, 618, 334, 642, 765, 397, 1193, 132076, 997, 1375, 563, 158...
[ 0.08642578125, 0.035552978515625, 0.1070556640625, 0.037109375, 0.11474609375, 0.131103515625, 0.07080078125, 0.1351318359375, 0.169677734375, 0.15625, 0.01068115234375, 0.1805419921875, 0.1298828125, 0.168212890625, 0.1451416015625, 0.004913330078125, 0.0648193359375, 0.0127563476...
d2cd6bd137f5eb61fef61845e25911c7c5b1b1c0
subsection
105
153
Low-energy pseudo-holomorphic sections
But \ker \nabla _v^*=0 because K is Morse–Smale, and \ker \nabla _u^*=0 because \mu is non-degenerate.Lemma 4.10 The number \# ^{\mathrm {grad}}(\bar{x}, x)_0 of isolated gradient-type pairs asymptotic to \bar{x}\in \operatorname{Fix}(\mu ) and to x\in \widehat{V}\cap \widehat{V}^{\prime } is equal to 1 if \rho (x)=\b...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 4966, 1728, 76, 7119, 334, 1639, 145407, 6637, 341, 83, 5919, 184, 1104, 49100, 4, 136, 6, 41872, 101, 34, 8353, 561, 351, 112, 48281, 67, 18023, 1398, 963, 14012, 4904, 24854, 125458, 42, 39, 8961, 47391, 132, 1299, 425, 8152, 1022, ...
[ 0.09130859375, 0.2017822265625, 0.1219482421875, 0.182373046875, 0.1727294921875, 0.068115234375, 0.2314453125, 0.0634765625, 0.1387939453125, 0.0357666015625, 0.1588134765625, 0.2149658203125, 0.03692626953125, 0.227783203125, 0.008941650390625, 0.024627685546875, 0.00897216796875, ...
7de8692cdb64ed5b9b6d7a59ca0e30ce1075fb87
subsection
106
153
Low-energy pseudo-holomorphic sections
Notice also that the set U^{\prime }:=\overline{U_B\cup U_C}\subset \widehat{S} has the property that any pair of horizontal sections (u,v) over U^{\prime } (or rather, over its image in \widehat{S}_\Gamma ), satisfying the matching condition \widehat{\mathsf {V}}, extends to an element of ^{\mathrm {grad}}(J_M,J_Q). B...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 548, "openalex_id": "", "raw": "P. Seidel, A long exact sequence for symplectic Floer cohomology, Topology 42 (2003), no. 5, 1003–1063.", "source_ref_id": "66f33142e3fc0935dbe66c96537d89637d4f000a", "start": 319 } ...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0686a2f2146c4158e4db92bce76418c5ad3f118a
subsection
107
153
Low-energy pseudo-holomorphic sections
It is better to replace u_n by \tilde{u}_n, so that Floer's equation (REF ) holds, because (\tilde{u}_n,v_n) is subject to a Lagrangian matching condition which is independent of n. Moreover, and satisfies a version of Floer's equation (REF ) whose coefficients converge in C^\infty as n\rightarrow \infty . Gromov–Floer...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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eb45ba538c3504d4980dd5e2243861c919142d78
subsection
108
153
Low-energy pseudo-holomorphic sections
The deformation operator {D}=D_{(0,w)}\Phi is given by{D} (t, \dot{w}) = D_0 \dot{w} + \frac{t}{2} ( \beta \circ J - J\circ \beta ) \circ dw \circ j ,where \beta = (d/dt)(\alpha _t)|_{t=0}. But \beta (T^{\mathrm {h}}E_\Gamma )=0, and so if w=(u_\infty ,v_\infty ) is our pair of horizontal sections then ( \beta \circ J ...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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fe2e41653909fd40e841bf5d91f71fe8b5258aa8
subsection
109
153
Low-energy pseudo-holomorphic sections
This contradicts regularity of (u_n,v_n).Thus A is an isomorphism, and there exist coordinates in which \kappa is given by the map\times ^k \rightarrow ^k, \quad (\lambda , x)\mapsto \lambda x,and \mathsf {pr}_2 \colon \times ^k \rightarrow corresponds to the projection {Z}^{\mathrm {par}}\rightarrow . The strand \time...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0989fefebd236627495f09b46cf48756895a726c
subsection
110
153
Body
The algebraic mechanism we use to prove Theorem REF is closely related to that used by Seidel to establish the exactness of the sequence describing the effect of Dehn twists on Floer homology. However, because the the symplectic action functional is not exact and the action spectrum not necessarily discrete, two new in...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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74f7bde3b8feae47dcf25b64980cfb06caea63dc
subsection
111
153
Body
Completion is functorial: a homomorphism f of degree [0,\infty ) extends `by continuity' to a homomorphism \hat{f} between completions. We can still speak of a map F \colon \hat{V} \rightarrow \hat{V^{\prime }} having order I: we mean that, for all r, we haveF(\hat{V}_r) \subset \big ( \bigoplus _{s\in I}{V^{\prime }_{...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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ad63d3603dfd111eacae49b1eba485b61911c407
subsection
112
153
Body
\delta =\delta _{\mathrm {low}}+\delta _{\mathrm {high}}, where \delta _{\mathrm {low}} is equal to \widehat{\underline{d}}, the differential induced by d, and \delta _{\mathrm {high}} is a homomorphism of order [2\epsilon ,\infty ). H(A,d)=0.Then H(\hat{D},\delta )=0.Remark We can think of \underline{A} as the tensor...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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57368d59008a148640ea9f8af5f964034d955f81
subsection
113
153
Body
Let us give property (ii) a name: given R-modules A and B and a \Lambda _R-linear map f\colon A\otimes \Lambda _R\rightarrow A\otimes \Lambda _R, let us say f is positive if f(a)=\sum {b_i t^{r_i}} for elements b_i\in B and r_i\ge 0.The following lemma is a generalisation of a rotated version of .Lemma 5.4 (Double mapp...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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9c30b1864a6339fe92a200145c3c7728c7331ea1
subsection
114
153
Body
One can write c=c_{\mathrm {low}}+c_{\mathrm {high}} and h=h_{\mathrm {low}}+h_{\mathrm {high}}, where the linear maps c_{\mathrm {low}} and h_{\mathrm {low}} have order [0,\epsilon ) while c_{\mathrm {high}} and h_{\mathrm {high}} have order [ 2\epsilon ,\infty ).Further assumethe maps c_{\mathrm {low}} and h_{\mathrm...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0ff7f2f8404e6cd1dcce98397f2f4f08f628bf4b
subsection
115
153
Body
We use ord 2 to decompose the differential as \delta = \delta _{\mathrm {low}} + \delta _{\mathrm {high}}, where\delta _{\mathrm {low}}= \left[ \begin{array}{ccc} 0 & 0 & 0 \\ 0 & 0 & 0 \\ -h_{\mathrm {low}} & c_{\mathrm {low}} & 0 \end{array} \right] , \quad \delta _{\mathrm {high}} = \left[ \begin{array}{ccc} d_{C^{\...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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90f9d52a4487135a2bf32f1dce6fbf6ea9e8bdeb
subsection
116
153
Body
A homomorphism f\colon V\rightarrow V^{\prime } between -graded modules has order I if f(V_r)\subset \bigoplus _{s\in I}{V^{\prime }_{r+s}} for all r.The following lemma is Seidel's variation on a well-known principle.Lemma 5.1 Suppose that (D,\delta ) is a finitely-supported -graded R-module with gap [\epsilon ,2\epsi...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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b22e02c72500b58720fb05c2379c3096366fb4fd
subsection
117
153
Body
We can still speak of a map F \colon \hat{V} \rightarrow \hat{V^{\prime }} having order I: we mean that, for all r, we haveF(\hat{V}_r) \subset \big ( \bigoplus _{s\in I}{V^{\prime }_{r+s} }\big )\, \hat{} ,where \hat{V}_r\subset \hat{V} is the image of V_r under V\rightarrow \hat{V}, and the hat on the right-hand side...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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feaa42870b13fe273911d7af8c9757986a09db15
subsection
118
153
Body
\delta =\delta _{\mathrm {low}}+\delta _{\mathrm {high}}, where \delta _{\mathrm {low}} is equal to \widehat{\underline{d}}, the differential induced by d, and \delta _{\mathrm {high}} is a homomorphism of order [2\epsilon ,\infty ). H(A,d)=0.Then H(\hat{D},\delta )=0.Remark We can think of \underline{A} as the tensor...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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21b769ff91b7417c7a601852bd1ce843a0217a09
subsection
119
153
Body
Let us give property (ii) a name: given R-modules A and B and a \Lambda _R-linear map f\colon A\otimes \Lambda _R\rightarrow A\otimes \Lambda _R, let us say f is positive if f(a)=\sum {b_i t^{r_i}} for elements b_i\in B and r_i\ge 0.The following lemma is a generalisation of a rotated version of .Lemma 5.4 (Double mapp...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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39070ada23b9c9157ec162530c3629e284141af6
subsection
120
153
Body
One can write c=c_{\mathrm {low}}+c_{\mathrm {high}} and h=h_{\mathrm {low}}+h_{\mathrm {high}}, where the linear maps c_{\mathrm {low}} and h_{\mathrm {low}} have order [0,\epsilon ) while c_{\mathrm {high}} and h_{\mathrm {high}} have order [ 2\epsilon ,\infty ).Further assumethe maps c_{\mathrm {low}} and h_{\mathrm...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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aaa40f11a0d24cb4a250f4bc2ef357e151ed2584
subsection
121
153
Body
We use ord 2 to decompose the differential as \delta = \delta _{\mathrm {low}} + \delta _{\mathrm {high}}, where\delta _{\mathrm {low}}= \left[ \begin{array}{ccc} 0 & 0 & 0 \\ 0 & 0 & 0 \\ -h_{\mathrm {low}} & c_{\mathrm {low}} & 0 \end{array} \right] , \quad \delta _{\mathrm {high}} = \left[ \begin{array}{ccc} d_{C^{\...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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32d1becca514f99c5a1b131b897ffb2ba5d3ba5e
subsection
122
153
Completing the proof
All the ingredients in our proof of Theorem REF are now to close to hand. Recall from the introduction that the Gysin sequence is derived from the exact sequence of a mapping cone: indeed, it is an immediate consequence of Theorem REF . The definition of \rho _* is algebraic. To prove Theorem REF we shall invoke the do...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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8990e0c4cd407b1daec34f14cab0805a2c1ecbf6
subsection
123
153
Completing the proof
It follows that h and c are positive, so pos holds.This explains why we chose to concentrate A and A^{\prime } in degree 0 rather than grading them by representatives the action functional. Moreover, ord 2 holds because \epsilon <\epsilon _4. The crucial condition low 2 comes from Lemmas REF , REF and REF .This complet...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0d9c3657d97f12b24dea5d980ce1cd0817ac6b60
subsection
124
153
Completing the proof
From Proposition REF , we have a canonical bijection between \widehat{V}\cap \widehat{V}^{\prime } and \operatorname{Fix}(\mu )\amalg \operatorname{Fix}(\mu ). We assign -degrees to elements of \widehat{V}\cap \widehat{V}^{\prime } so that the map (h_0,c_0) induced by this bijection preserves degree. We choose \epsilo...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c6d1f7725489c31785b521b669fc2ccd84cede5a
subsection
125
153
Completing the proof
Then \operatorname{Fix}(\mu )=\operatorname{crit}(H), and the Floer complex \operatorname{CF}(\phi _H) is canonically identified with the Morse complex for H. Similarly, \operatorname{CF}(\widehat{V}, (\phi _K\times \phi _H)\widehat{V}) is identified with the Morse complex for H\times K restricted to V. We have establi...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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4d8b8bf5ad42e68365f928daf65df60d4a9aed03
subsection
126
153
On the borderline
We now analyse the breakdown of the Gysin sequence in the borderline case where mon holds but mas just fails because m^{\min }_{\widehat{V}}=k+1. We saw at the outset (Example REF ) that Theorem REF can then also fail.Consider the moduli space \widetilde{{N}} of parametrized J-holomorphic discs \delta \colon (D,\partia...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1023, "openalex_id": "", "raw": "D. Kwon and Y.-G. Oh, with an appendix by J.-P. Rosay, Structure of the image of (pseudo)-holomorphic discs with totally real boundary condition, Comm. Anal. Geom. 8 (2000), no. 1, 31–82.", "...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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0e8f15c06db1c07fc3c25ad0aad94e44e0702028
subsection
127
153
On the borderline
The conclusions of Theorem REF hold when one replaces the map e by e+ t^{(k+1)\lambda } \nu _Y\,\mathrm {id}, where \lambda is the monotonicity constant of \widehat{V}.The construction of the map e obviously goes through. Less obviously, so does that of \rho ^!: limits of sequences of sections of index 0 or 1 cannot bu...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2046, "openalex_id": "", "raw": "P. Biran and O. Cornea, Quantum structures for Lagrangian submanifolds, 2007 preprint, ArXiv: 0708.4221v1 [math.SG].", "source_ref_id": "b94f49446e213dca0d65d6ebda57fcf0c072c851", "star...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c8f9b2e2d41ee09ea12372e8d76a9f2cde07f172
subsection
128
153
On the borderline
\circ e + \nu _Y t^{ (k+1) \lambda } \, \rho ^! (the Novikov weight \lambda (k+1) is the area of the minimal Maslov-index discs). That is, h is a nullhomotopy of \rho ^!+ t^{\lambda (k+1)} \nu _Y \mathrm {id}.The analysis of low-action sections goes through unchanged. We may assume that (k+1)\lambda \gg \epsilon , whic...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1501, "openalex_id": "", "raw": "D. Kwon and Y.-G. Oh, with an appendix by J.-P. Rosay, Structure of the image of (pseudo)-holomorphic discs with totally real boundary condition, Comm. Anal. Geom. 8 (2000), no. 1, 31–82.", "...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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e5972a8580ecd5cb297060966fe2d6be1199425d
subsection
129
153
On the borderline
The space (_1^{-1}(\lbrace x\rbrace )\cap _{-1}^{-1}(Y)) / is a compact 0-manifold.Definition 6.1 Define \nu _Y= \# ( (_1^{-1}(x)\cap _{-1}^{-1}(Y)) /) \in /2.Note that \nu _Y is independent of x and of (regular) J. For example, \nu _Y=0 if, for some J, there is a point x\in \widehat{V} which does not lie on a J-holom...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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9d7510b8cc6e5a42b196f002fabae9aac91014d6
subsection
130
153
On the borderline
The moduli space now has ends corresponding to configurations consisting of:A pair (u,v) of pseudo-holomorphic sections of index 0; and a bubble \delta \colon (D,\partial D) \rightarrow (M_-\times N,\widehat{V}) such that \delta (1)=v(p) and \delta (-1) \in \operatorname{im}Y.These configurations contribute the follow...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 530, "openalex_id": "", "raw": "P. Biran and O. Cornea, Quantum structures for Lagrangian submanifolds, 2007 preprint, ArXiv: 0708.4221v1 [math.SG].", "source_ref_id": "b94f49446e213dca0d65d6ebda57fcf0c072c851", "start...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c5ffde7c65216188e0ddc3b60d1b740865a411ec
subsection
131
153
Compatibility with quantum cap product
The quantum cohomology QH^*(N)=H^*(N;\Lambda _{/2}) acts on \operatorname{HF}_*(\mu ) by quantum cap product. This makes it a module over the algebra QH^*(N) with its quantum product. Since the map e is itself defined as the quantum cap product by the Euler class of \rho \colon V\rightarrow N, and since QH^*(N) is (sup...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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19c5cdebe15902c2c7cf406bdf2bf5e424256512
subsection
132
153
Orientations
To define Floer homology over \Lambda _, one needs to specify a system of coherent orientations. This can be reduced to topology: to specify coherent orientations for the Lagrangian Floer homology \operatorname{HF}_*(L_0,L_1) of L_0,L_1\subset P , it suffices to give relative spin-structures on the two Lagrangians, tha...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 474, "openalex_id": "", "raw": "K. Fukaya, Y.-G. Oh, H. Ohta and K. Ono, Lagrangian intersection Floer theory: anomaly and obstruction, book manuscript, 2000.", "source_ref_id": "a28bd2e118e38f4d335fbef31010a03e4e562d2f", ...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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e2e5dccc5eaf276bcabcdd99e77ef74ddea35aa8
subsection
133
153
Orientations
Applying this last principle to U=T V, we see that to give a spin-structure on \xi |_{ \widehat{V}} \oplus T\widehat{V} it suffices to give a spin-structure \sigma in N_{V/M}.Now, \sigma also induces a spin-structure (\mathrm {id}\times \mu )^* \sigma on the normal bundle to \widehat{V}^{\prime }= (\mathrm {id}\times \...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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a158b04b308dabbd97966530515c7f69222c3507
subsection
134
153
Orientations
This can be reduced to topology: to specify coherent orientations for the Lagrangian Floer homology \operatorname{HF}_*(L_0,L_1) of L_0,L_1\subset P , it suffices to give relative spin-structures on the two Lagrangians, that is, to give a stable vector bundle \xi \rightarrow P, together with stable spin-structures on \...
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0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c18f2a7278ee77b84e39ff27a3b96e9a53eced63
subsection
135
153
Orientations
Applying this last principle to U=T V, we see that to give a spin-structure on \xi |_{ \widehat{V}} \oplus T\widehat{V} it suffices to give a spin-structure \sigma in N_{V/M}.Now, \sigma also induces a spin-structure (\mathrm {id}\times \mu )^* \sigma on the normal bundle to \widehat{V}^{\prime }= (\mathrm {id}\times \...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
[ 5659, 4568, 24702, 345, 1369, 618, 310, 1957, 8337, 25927, 9, 137656, 98, 5134, 113458, 2943, 856, 32108, 384, 133784, 20561, 541, 64, 594, 192, 135989, 532, 70141, 561, 1639, 3638, 57134, 133, 114654, 58944, 144142, 45646, 15044, 38699, ...
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9375186bf135fa2569393d3045e59d31438937cd
subsection
136
153
Connected sums of three-manifolds
This final section explains the (conjectural) connection between the symplectic Gysin sequence and gauge theory on 3- and 4-manifolds.This final section explains the (conjectural) connection between the symplectic Gysin sequence and gauge theory on 3- and 4-manifolds.
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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b17016e1415e572eb6a67ca8d49ed6c5df7b4766
subsection
137
153
Connected sums and indefinite singularities
Let Y_1 and Y_2 be closed, oriented smooth 3-manifolds. When f_1\colon Y_1 \rightarrow S^1 and f_2 \colon Y_2\rightarrow S^1 are harmonic Morse functions, that is, circle-valued Morse functions with only indefinite critical points, the connected sum Y_1\, \# \,Y_2 inherits a harmonic Morse function with (\# \operatorna...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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c7f164e17a79d2cbf515a447280e30daa564069f
subsection
138
153
Connected sums and indefinite singularities
Let H = \lbrace z: |z| \le 1, \operatorname{Im}(z) \ge 0 \rbrace \subset be a closed half-disc, and let m H[0,1] be the modulus function, z|z|. Let X0 = m* W; so X0 carries a natural map F0X0H. Take the trivial cobordism (Y_1 \amalg Y_2) \times [0,1], and let F_1 = (f_1 \amalg f_2, \mathrm {id})\colon (Y_1 \amalg Y_2) ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1573, "openalex_id": "", "raw": "T. Perutz, Lagrangian matching invariants for fibred four-manifolds: I, Geom. Topol. 11 (2007), 759–828; II, Geom. Topol. 12 (2008), 1461–1542.", "source_ref_id": "673eb0f7278b06a25ad18555c86...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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d5690b405274f945de0b32ee71f46a6a11c5b890
subsection
139
153
Connected sums and indefinite singularities
There is an elementary cobordism W from \Sigma _1 \amalg \Sigma _2 to \Sigma _1\#\Sigma _2, carrying a Morse function with a single critical point c_2, of index 2. Likewise, there is an elementary cobordism W^{\prime } from \Sigma _1\#\Sigma _2 to \Sigma _1 \amalg \Sigma _2, carrying a Morse function with a single crit...
{ "cite_spans": [] }
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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7767e0d757855cdf6c41ed101bd42bd21e41e47a
subsection
140
153
Connected sums and indefinite singularities
Trivialise F_1 over H (extending the existing trivialisation over the straight edge). Now define X by excising F_1^{-1} (H) from (Y_1 \amalg Y_2) \times [0,1] and gluing in X_0 in its place, in a way which should be clear. ThusX = X_0 \cup \left( (Y_1 \amalg Y_2) \times [0,1] \setminus F^{-1}(H) \right).The map F\colon...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1044, "openalex_id": "", "raw": "T. Perutz, Lagrangian matching invariants for fibred four-manifolds: I, Geom. Topol. 11 (2007), 759–828; II, Geom. Topol. 12 (2008), 1461–1542.", "source_ref_id": "673eb0f7278b06a25ad18555c86...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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e51673e9d0e92c76a06df6510d6dbee289983699
subsection
141
153
Symmetric products
This section describes a class of examples of the symplectic Gysin sequence. In these examples, M is \operatorname{Sym}^n(\Sigma ), the nth symmetric product of a closed Riemann surface \Sigma , for some n\ge 1. The symplectic form \omega _\lambda on M is a Kähler form representing one of the classes \eta _\Sigma + \la...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1551, "openalex_id": "", "raw": "D. Salamon, Seiberg-Witten invariants of mapping tori, symplectic fixed points, and Lefschetz numbers, Proceedings of 6th Gökova Geometry–Topology Conference. Turkish J. Math. 23 (1999), no. 1, 117...
0807.1863
A symplectic Gysin sequence
[ "Timothy Perutz" ]
[ "math.SG", "math.GT" ]
2,008
en
Mathematics
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