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--- abstract: | A Kerr black hole with mass parameter $m$ and angular momentum parameter $a$ acting as a gravitational lens gives rise to two images in the weak field limit. We study the corresponding magnification relations, namely the signed and absolute magnification sums and the centroid up to post-Newtonian or...
--- author: - 'J. Woillez[^1]' - 'J.A. Abad' - 'R. Abuter' - 'E. Aller Carpentier' - 'J. Alonso' - 'L. Andolfato' - 'P. Barriga' - 'J.-P. Berger' - 'J.-L. Beuzit' - 'H. Bonnet' - 'G. Bourdarot' - 'P. Bourget' - 'R. Brast' - 'L. Caniguante' - 'E. Cottalorda' - 'P. Darré' - 'B. Delabre' - 'A. Delboulbé' - 'F. Delplancke-...
--- address: | $^1$ IXA Group, HiTZ Centre, University of the Basque Country UPV/EHU, Donostia-San Sebastian, Spain\ $^2$ Intercom Strategys, Madrid, Spain\ zotova.el@gmail.com, rodrigo.agerri@ehu.eus, manuel.nunez@lunigtuk.com, german.rigau@ehu.eus bibliography: - 'bibliography.bib' title: 'Multilingual St...
--- author: - 'Parinya Chalermsook[^1]' - 'Marek Cygan[^2]' - 'Guy Kortsarz[^3]' - 'Bundit Laekhanukit[^4]' - 'Pasin Manurangsi[^5]' - 'Danupon Nanongkai[^6]' - 'Luca Trevisan[^7]' bibliography: - 'citations.bib' - 'citations.bib' title: | From Gap-ETH to FPT-Inapproximability:\ Clique, Dominating Set, and More...
--- abstract: 'This work concludes a series of four papers on the foundational theory of orbifolds and stacks. We apply the abstract theory, developed in its predecessors, to orbifolds derived from manifolds. Specifically, we show how the very concrete topological base spaces associated to such orbifolds can be describ...
--- abstract: 'We report the detection of strong and compact molecular line emission (in the CO J=3–2,4–3,6–5,7–6, $^{13}$CO J=3–2, HCN and HCO$^+$ J=4–3 transitions) from a cometary-shaped object (Carina-frEGG1) in the Carina star-forming region (SFR) previously classified as a photoevaporating protoplanetary disk (pr...
--- abstract: 'There exist non-trivial stationary points of the Euclidean action for an axion particle minimally coupled to Einstein gravity, dubbed wormholes. They explicitly break the continuos global shift symmetry of the axion in a non-perturbative way, and generate an effective potential that may compete with QCD ...
--- abstract: 'We show that Be stars belong to a high velocity tail of a single B-type star rotational velocity distribution in the main sequence (MS). We studied 127 galactic field Be stars and obtained their true equatorial velocity at the ZAMS using models of stellar evolution with rotation. There is a sharp mass-de...
--- abstract: 'We propose a class of weighted $L_2$-type tests of fit to the Gamma distribution. Our novel procedure is based on a fixed point property of a new transformation connected to a Steinian characterization of the family of Gamma distributions. We derive the weak limits of the statistic under the null hypothe...
--- abstract: | We have considered the $S=1/2$ antiferromagnetic Heisenberg model in two dimensions, with an additional Ising [next-nearest neighbour]{}interaction. Antiferromagnetic [next-nearest neighbour]{}interactions will lead to frustration, and the system responds with flipping the spins down in the $xy$ pla...
--- abstract: 'In this paper, we introduce a contact pseudo-metric structure on a tangent sphere bundle $T_\varepsilon M$. we prove that the tangent sphere bundle $T_{\varepsilon}M$ is $(\kappa, \mu)$-contact pseudo-metric manifold if and only if the manifold $M$ is of constant sectional curvature. Also, we prove that ...
--- abstract: 'Existing xenon dark matter (DM) direct detection experiments can probe the DM-nucleon interaction of DM with a sub-GeV mass through a search for photon emission from the recoiling xenon atom. We show that LUX’s constraints on sub-GeV DM, which utilise the scintillation (S1) and ionisation (S2) signals, a...
--- author: - | [Рутвиг Кампоамор-Штурсберг]{}\ [Universidad Complutense de Madrid]{}\ email: rutwig@ucmail.ucm.es title: 'Разрешимые алгебры Ли, заданные произведением образующих, и некоторые их приложения' --- [Аннотация]{} [В настоящей работе мы обобщаем определение произведения образующими на класс ра...
Driven vortex lattices interacting with quenched and thermal disorder are an ideal system in which to study the nonequilibrium phases and transitions that arise from the interplay of competing interactions [@Koshelev; @Giamarchi; @Brag-Balents-Scheidl; @Olson; @Higgins-Beasly; @Yaron; @Kes]. Transport measurements [@Hi...
Introduction ============ The summation of Coulomb potentials over crystal lattices is a classical problem [@Glas80] important for determining the cohesive energy in crystals [@Tosi64] as well as for describing electronic properties there [@Harr75; @Ihm988]. Despite a long history of this subject ($\hspace{-3.5pt}$[@K...
--- abstract: 'We define a decomposition of link projections whose pieces we call atoroidal graphs. We describe a surgery operation on these graphs and show that all atoroidal graphs can be generated by performing surgery repeatedly on a family of well known link projections. This gives a method of enumerating and henc...
--- abstract: 'Let $\mathfrak{Var}_k^G$ denote the category of pairs $(X,\sigma)$, where $X$ is a variety over $k$ and $\sigma$ is a group action on $X$. We define the Grothendieck ring for varieties with group actions as the free abelian group of isomorphism classes in the category $\mathfrak{Var}_k^G$ modulo a cuttin...
--- abstract: 'Due to their relevance in controller design, we consider the problem of determining the $\mathcal{L}^2$-gain, passivity properties and conic relations of an input-output system. While, in practice, the input-output relation is often undisclosed, input-output data tuples can be sampled by performing (nume...
--- abstract: 'Nowadays, recommender systems (RSes) are becoming increasingly important to individual users and business marketing, especially in the online e-commerce scenarios. However, while the majority of recommendation algorithms proposed in the literature have focused their efforts on improving prediction accura...
--- abstract: 'For superconducting quantum processors consisting of low anharmonicity qubits such as transmons we give a complete microwave description of the system in the qubit subspace. We assume that the qubits are dispersively coupled to a distributed microwave structure such that the detunings of the qubits from ...
--- abstract: | Let $\Lambda X$ be the free loop space on a simply connected finite $CW$-complex $X$ and $\beta_{i}(\Lambda X;\Bbbk)$ be the cardinality of a minimal generating set of $H^{i}(\Lambda X;\Bbbk)$ for $\Bbbk$ to be a commutative ring with unit. The sequence $ \beta_{i}(\Lambda X;\Bbbk) $ grows unbou...
--- abstract: 'We study a quantum computing system using microwave photons in transmission line resonators on a superconducting chip as qubits. We show that all control necessary for quantum computing can be implemented by coupling to Josephson devices on the same chip. We take advantage of the strong nonlinearities in...
--- author: - Ketil Malde --- ![\[fig:orgc25ca3b\] Cluster radius for the 65 individual categories (gray) and the average (black) as training progresses.](cluster_radii.pdf){width="0.6\linewidth"} ![\[fig:org02c6c6b\] Output change measured as the distance cluster centroids move between iterations. Individual centroi...
--- abstract: | We introduce in this paper a new four-parameter generalized version of the linear failure rate (LFR) distribution which is called Beta-linear failure rate (BLFR) distribution. The new distribution is quite flexible and can be used effectively in modeling survival data and reliability problems. It ca...
--- abstract: 'Let $G:= (\mathbb C^{\star })^k\times SL_2(\mathbb C)$ act linearly on a vector space or its projectivisation. We obtain an effective criterion to detect whether a number of orbits in an orbit-closure is finite or not.' author: - 'E. V. Sharoyko' title: 'Quasihomogeneous $(\mathbb C^*)^k \times SL_2(\mat...
--- abstract: 'We develop a method for finding the time evolution of exactly solvable models by Bethe ansatz. The dynamical Bethe wavefunction takes the same form as the stationary Bethe wavefunction except for time varying Bethe parameters and a complex phase prefactor. From this, we derive a set of first order nonlin...
--- abstract: 'Singlet fission (SF) is a multi-exciton generation process that could be harnessed to improve the efficiency of photovoltaic devices. Experimentally, systems derived from the pentacene molecule have been shown to exhibit ultrafast SF with high yields. Charge-transfer (CT) configurations are likely to pla...
--- abstract: 'We present a detailed analysis of spectral line profiles in Type Ia supernova (SN Ia) spectra. We focus on the feature at [$\sim\!\!$ ]{}3500 – 4000 Å, which is commonly thought to be caused by blueshifted absorption of Ca H&K. Unlike some other spectral features in SN Ia spectra, this feature often has ...
--- author: - Julien Garaud - Egor Babaev title: Domain walls and their experimental signatures in s+is superconductors ---
--- abstract: 'Let $G$ denote a complex semisimple linear algebraic group, $P$ a parabolic subgroup of $G$ and $\mathcal{P}=G/P$. We identify the quantum multiplication by divisors in $T^*\mathcal{P}$ in terms of stable basis, which is introduced in [@Maulik2012]. Using this and the restriction formula for stable basis...
--- abstract: | We present a color-magnitude diagram for a region $1'-2'$ from the center of M32 based on [*Hubble Space Telescope*]{} WFPC2 images. The broad color-luminosity distribution of red giants shows that the stellar population comprises stars with a wide range in metallicity. This distribution cannot be e...
--- abstract: 'High-resolution spectroscopy was obtained of the FUors FU Ori and V1057 Cyg between 1995 and 2002 with the SOFIN spectrograph at NOT and with HIRES at Keck I. During these years FU Ori remained about 1 mag.(in B) below its 1938–39 maximum brightness, but V1057 Cyg (B $\approx$ 10.5 at peak in 1970–71) fa...
--- abstract: 'Many stochastic differential equations that occur in financial modelling do not satisfy the standard assumptions made in convergence proofs of numerical schemes that are given in textbooks, i.e., their coefficients and the corresponding derivatives appearing in the proofs are not uniformly bounded and he...
--- address: | *${}^a$TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3\ *${}^b$Department of Physics, University of Washington, Seattle, WA 98195** author: - 'FRANK X. LEE,$^{a}$ DEREK B. LEINWEBER,${}^{b}$ XUEMIN JIN$\, {}^a$' title: NEW QCD SUM RULES FOR NUCLEON AXIAL VECTOR COUPLING C...
--- author: - 'Luigi Lombardo$^{12*}$, Thomas Opitz$^3$, Raphael Huser$^1$\' bibliography: - 'landslides.bib' title: 'Point process-based modeling of multiple debris flow landslides using INLA: an application to the 2009 Messina disaster' --- We develop a stochastic modeling approach based on spatial point processes o...
--- abstract: | The aim of this paper is to present and validate two new procedures to enforce the Geometric Conservation Law (GCL) on a moving grid for an Arbitrary Lagrangian Eulerian (ALE) formulation of the Euler equations discretized in time for either the Non Linear Frequency Domain (NLFD) or Time-Spectral (T...
--- abstract: 'We present the results of a *Chandra* X-ray survey of the 8 most massive galaxy clusters at $z>1.2$ in the South Pole Telescope 2500 deg$^2$ survey. We combine this sample with previously-published *Chandra* observations of 49 massive X-ray-selected clusters at $0 < z < 0.1$ and 90 SZ-selected clusters a...
--- abstract: 'We show the integrality of the simple Hurwitz numbers. The main tool is the cut-and-join operator, and our proof is a purely combinatorial one.' address: 'Research Institute for Mathematical Sciences, Kyoto University, Kyoto 606-8502, Japan' author: - Shintarou Yanagida date: 'December 17, 2014' title: I...
--- abstract: 'Let $\XX$ be a compact, smooth, connected, Riemannian manifold without boundary, $G:\XX\times\XX\to \RR$ be a kernel. Analogous to a radial basis function network, an eignet is an expression of the form $\sum_{j=1}^M a_jG(\circ,y_j)$, where $a_j\in\RR$, $y_j\in\XX$, $1\le j\le M$. We describe a determini...
[\ http:monotone.uwaterloo.ca/$\sim$journal]{} $~$\ \[.2in\] [**ON STABILITY OF GENERALIZED CAUCHY-TYPE PROBLEM**]{} .20in Sandeep P Bhairat\ [Department of Mathematics,\ Institute of Chemical Technology, Mumbai–400 019, (M.S) India.\ ]{} [[**Abstract.**]{} In this paper, we study the stability of solution of initi...
--- abstract: 'The [1-2 ]{}model on the hexagonal lattice is a model of statistical mechanics in which each vertex is constrained to have degree either $1$ or $2$. There are three edge-directions, and three corresponding parameters $a$, $b$, $c$. It is proved that, when $a \ge b \ge c > 0$, the surface given by $\sqrt ...
--- abstract: 'The game of best choice (also known as the secretary problem) is a model for sequential decision making with a long history and many variations. The classical setup assumes that the sequence of candidate rankings are uniformly distributed. Given a statistic on permutations, one can generalize the uniform...
--- abstract: 'In this paper, we study the stability problem of a star-shaped network of elastic strings with a local Kelvin-Voigt damping. Under the assumption that the damping coefficients have some singularities near the transmission point, we prove that the semigroup corresponding to the system is polynomially stab...
--- abstract: 'Photocatalytic materials are pivotal for the implementation of disruptive clean energy applications such as conversion of H$_{2}$O and CO$_{2}$ into fuels and chemicals driven by solar energy. However, efficient and cost-effective materials able to catalyze the chemical reactions of interest when exposed...
--- abstract: 'In models with a light scalar field (the ‘acceleron’) coupled to neutrinos, neutrino masses depend on neutrino density. The resulting coupled system of mass varying neutrinos (MaVaNs) and the acceleron can act as a negative pressure fluid and is a candidate for dark energy [@Fardon:2003eh] . MaVaNs also ...
--- abstract: 'Lattice Boltzmann Method(LBM) has achieved considerable success on simulating complex flows. However, how to impose correct boundary conditions on the fluid-solid interface with complex geometries is still an open question. Here we proposed a velocity interpolation based bounce-back scheme where the idea...
--- author: - 'L. Pandolfi[^1]' title: 'The quadratic regulator problem and the Riccati equation for a process governed by a linear Volterra integrodifferential equations[^2]' --- [**:**]{} In this paper we study the quadratic regulator problem for a process governed by a Volterra integral equation in ${{\rm I\hskip-2...
--- abstract: 'We have studied via in-beam $\gamma$-ray spectroscopy $^{196}$Po and $^{198}$Po, which are the first neutron-deficient Po isotopes to exhibit a collective low-lying structure. The ratios of yrast state energies and the E2 branching ratios of transitions from non-yrast to yrast states are indicative of a ...
[**Compact pluricanonical manifolds are Vaisman**]{}\ [Liviu Ornea[^1], and Misha Verbitsky[^2]\ ]{} [**Abstract**]{}\ A locally conformally Kähler manifold is a Hermitian manifold $(M,I,\omega)$ satisfying $d\omega=\theta\wedge\omega$, where $\theta$ is a closed 1-form, called [**the Lee form**]{} of $M$. It is calle...
--- abstract: 'A modification of the Skellam and Poisson distributions is proposed for subsystems when the constraints imposed by the charge conservation law in the complete system are taken into account. Such distributions can be applied, for example, for an analysis of the fluctuations of baryon and net baryon number...
--- abstract: 'By using exact Path Integral Monte Carlo methods we calculate the equation of state of an interacting Bose gas as a function of temperature both below and above the superfluid transition. The universal character of the equation of state for dilute systems and low temperatures is investigated by modeling ...
--- abstract: | Neural machine translation - using neural networks to translate human language - is an area of active research exploring new neuron types and network topologies with the goal of dramatically improving machine translation performance. Current state-of-the-art approaches, such as the multi-head attent...
--- abstract: 'A graph-based classification method is proposed for semi-supervised learning in the case of Euclidean data and for classification in the case of graph data. Our manifold learning technique is based on a convex optimization problem involving a convex quadratic regularization term and a concave quadratic l...
--- abstract: 'Randomly crumpled sheets have shape memory. In order to understand the basis of this form of memory, we simulate triangular lattices of springs whose lengths are altered to create a topography with multiple potential energy minima. We then deform these lattices into different shapes and investigate their...
--- abstract: | Two coupled channel effects connected with kaon pair production in proton-proton collisions are discussed. (1) Although there is ample evidence that the antikaon is strongly attracted to the recoil protons in $pp\to K^+p\,\{K^-p\}$, residual effects of the $K^+K^-$ interaction are seen, including a ...
--- abstract: 'We study the isometry group of compact spherical orientable $3$-orbifolds $S^3/G$, where $G$ is a finite subgroup of $\mathrm{SO}(4)$, by determining its isomorphism type and, when $S^3/G$ is a Seifert fibrered orbifold, by describing the action on the Seifert fibrations induced by isometric copies of th...
--- abstract: 'The energy of a droplet of linear extent $l$ in the “droplet theory” of spin glasses goes as $l^{\theta}$ for large $l$. It is argued that this formula needs to be modified by the addition of a scaling correction $l^{-\omega}$ in order to accurately describe droplet energies at the length scales currentl...
--- author: - | Falk Bruckmann and\ Universität Regensburg, Universitätsstraße 31, 93053 Regensburg, Germary\ E-mail: , title: Scalar QCD at nonzero density --- =1 Introduction ============ Lattice QCD is one of the most important tools for studying the nonperturbative as well as thermodynamic aspects of...
--- abstract: 'A probable sky map of the emission from a short-lived isotrope produced by massive stars is presented. The model is based on the nonaxisymmetric component of a dust distribution model developed to reproduce Galactic FIR emission. Features seen in COMPTEL observations are qualitatively reproduced.' addres...
--- abstract: 'We consider classification tasks in the regime of scarce labeled training data in high dimensional feature space, where specific expert knowledge is also available. We propose a new hybrid optimization algorithm that solves the elastic-net support vector machine (SVM) through an alternating direction met...
--- abstract: | In this work we study the overheads of virtual-to-physical address translation in processor architectures, like x86-64, that implement paged virtual memory using a radix tree which are walked in hardware.\ Translation Lookaside Buffers are critical to system performance, particularly as applicat...
--- abstract: 'We present a numerical study of mixed boson-fermion systems at zero temperature in isotropic and anisotropic harmonic traps. We investigate the phenomenon of component separation as function of the strength of the inter-particle interaction. While solving a Gross-Pitaevskii mean field equation for the bo...
--- abstract: 'It is well known that the description of topological and geometric properties of bisectors in normed spaces is a non-trivial subject. In this paper we introduce the concept of bounded representation of bisectors in finite dimensional real Banach spaces. This useful notion combines the concepts of bisecto...
--- abstract: 'Transient computing has become popular in public cloud environments for running delay-insensitive batch and data processing applications at low cost. Since transient cloud servers can be revoked at any time by the cloud provider, they are considered unsuitable for running interactive application such as ...
--- abstract: | We present the first results of a study of faint 12$\mu$m sources detected with the Infrared Space Observatory (ISO) in four deep, high galactic latitude fields. The sample includes 50 such sources in an area of 0.1 square degrees down to a 5$\sigma$ flux limit of $\sim 500\mu$Jy. From optical i...
--- abstract: 'Analyzing archival data from different telescopes, H$_2$O megamaser Seyfert 2s appeared to exhibit higher nuclear radio luminosities than non-masing Seyfert 2s (Zhang et al. 2012). This has been confirmed by our follow-up study on multi-band (11, 6, 3.6, 2, 1.3cm) radio properties of maser host Seyfert 2...
--- abstract: | On the night of Oct 31, 2015 two bright Southern Taurid fireballs occurred over Poland, being one of the most spectacular bolides of this shower in recent years. The first fireball - PF311015a Okonek - was detected by six video stations of Polish Fireball Network (PFN) and photographed by several by...
--- abstract: 'Let $A$ be a set in a prime field $\mathbb{F}_p$. In this paper, we prove that $d\times d$ matrices with entries in $A$ determine almost $|A|^{3+\frac{1}{45}}$ distinct determinants and almost $|A|^{2-\frac{1}{6}}$ distinct permanents when $|A|$ is small enough.' author: - 'Doowon Koh[^1]' - 'Thang Pham[...
--- author: - 'Giulia Albonico,' - Yvonne Geyer - '& Lionel Mason' bibliography: - '../twistor-bib.bib' title: Recursion and worldsheet formulae for 6d superamplitudes --- Introduction ============ Worldsheet approaches to scattering amplitudes generate perhaps the most compact and mathematically structured formulae...
--- abstract: 'We propose logical characterizations of problems solvable in deterministic polylogarithmic time (${\mathrm{PolylogTime}}$) and polylogarithmic space (${\mathrm{PolylogSpace}}$). We introduce a novel two-sorted logic that separates the elements of the input domain from the bit positions needed to address ...
--- abstract: | Quantum algorithms can break factoring and discrete logarithm based cryptography and weaken symmetric cryptography and hash functions. In order to estimate the real-world impact of these attacks, apart from tracking the development of fault-tolerant quantum computers it is important to have an ...
--- abstract: 'We consider the spherically symmetric, asymptotically flat Einstein-Vlasov system. We find explicit conditions on the initial data, with ADM mass $M,$ such that the resulting spacetime has the following properties: there is a family of radially outgoing null geodesics where the area radius $r$ along each...
--- abstract: 'A proof of concept detector is presented for scintillation light detection in liquid argon using Silicon Photo-Multipliers. The aim of the work is to build an anti-Compton veto for germanium detectors operated directly in liquid argon like in the GERDA experiment. Properties of the Multi-Pixel Photon Cou...
--- abstract: | We analyze the proximity effect in a superconductor/ferromagnet (S/F) structure with a local inhomogeneity of the magnetization in the ferromagnet near the S/F interface. We demonstrate that not only the singlet but also the triplet component of the superconducting condensate is induced in the ferro...
--- abstract: 'Let $S \subseteq {\mathbb N}$ be a numerical semigroup with multiplicity $m$, conductor $c$ and minimal generating set $P$. Let $L=S \cap [0,c-1]$ and $W(S)=|P||L|-c$. In 1978, Herbert Wilf asked whether $W(S) \ge 0$ always holds, a question known as Wilf’s conjecture and open since then. A related numbe...
--- abstract: 'In this article, we continue our investigation on the role of non-commutativity in quantum theory. Using the method explained in *On non-commutativity in quantum theory (I): from classical to quantum probability*, we analyze two toy models which exhibit non-commutativity between the corresponding positio...
--- abstract: 'In this paper, we focus on developing efficient sensitivity analysis methods for a computationally expensive objective function $f(x)$ in the case that the minimization of it has just been performed. Here “computationally expensive” means that each of its evaluation takes significant amount of time, and ...
--- abstract: 'In this work we obtain a version of the Procesi-Rasmyslov Theorem for the algebra of semi-invariants of representations of an arbitrary quiver with dimension vector $(2,2,\ldots,2)$.' address: '117463, Novoyasenevsky pr-t, 32-1-559, Moscow, RussiaMoscow State University, department of Higher AlgebraEmail...
--- abstract: 'We prove that, in dimensions greater than $2$, the generic metric is not a Hessian metric and find a curvature condition on Hessian metrics in dimensions greater than $3$. In particular we prove that the forms used to define the Pontryagin classes in terms of the curvature vanish on a Hessian manifold. B...
--- author: - 'M. Dadina, C. Vignali, M. Cappi, G. Lanzuisi, G. Ponti, B. De Marco, G. Chartas, M. Giustini' date: 'Received ; Accepted' title: 'XMM-Newton reveals a Seyfert-like X-ray spectrum in the z=3.6 QSO B1422+231' --- [Matter flows from the central regions of quasars during their active phases are probably res...
--- abstract: '[*Location based services*]{} (LBS) have become very popular in recent years. They range from map services (e.g., Google Maps) that store geographic locations of points of interests, to online social networks (e.g., WeChat, Sina Weibo, FourSquare) that leverage user geographic locations to enable various...
--- abstract: 'We present X-ray observations of the field containing Nova Puppis 1942 (CP Pup) and Nova Puppis 1991 (V351 Pup), done with [*ASCA*]{} in 1998, and with [*XMM-Newton*]{} in 2005. The X-ray and UV luminosity of CP Pup seem to have remained approximately constant since the last X-ray observations of the 198...
--- abstract: 'We study the E-theory group $E_{[0,1]}(A,B)$ for a class of C\*-algebras over the unit interval with finitely many singular points, called elementary $C[0,1]$-algebras. We use results on E-theory over non-Hausdorff spaces to describe $E_{[0,1]}(A,B)$ where $A$ is a sky-scraper algebra. Then we compute $E...
--- abstract: 'The discrete states of $c=1$ string theory at the self-dual radius are associated with modes of $W_{1+\infty}$ currents and their genus zero correlators are computed. An analogy to a recent suggestion based on the integrable structure of the theory is found. An iterative method for deriving the dependenc...
--- abstract: 'We study the intersection ring of the space $\M(\alpha_1,\ldots,\alpha_m)$ of polygons in $\R^3$. We find homology cycles dual to generators of this ring and prove a recursion relation in $m$ (the number of steps) for their intersection numbers. This result is analog of the recursion relation appearing i...
--- abstract: | Recent numerical relativity simulations have shown that the emission of gravitational waves at the merger of two black holes gives a recoil kick to the final black hole. We follow the orbits of a recoiling supermassive black hole (SMBH) in a fixed background potential of a disk galaxy including the ...
--- author: - 'A. Ivanov [^1]' date: title: 'An $\omega$-categorical structure with amenable automorphism group' --- > [**Abstract.**]{} We analyse $\omega$-categorical precompact expansions of particular $\omega$-categorical structures from the viewpoint of amenability of their automorphism groups. > > [*2010 Mathe...
--- abstract: 'Software vulnerabilities affect all businesses and research is being done to avoid, detect or repair them. In this article, we contribute a new technique for automatic vulnerability fixing. We present a system that uses the rich software development history that can be found on GitHub to train an AI syst...
--- abstract: | The celebrated Perron–Frobenius (PF) theorem is stated for irreducible nonnegative square matrices, and provides a simple characterization of their eigenvectors and eigenvalues. The importance of this theorem stems from the fact that eigenvalue problems on such matrices arise in many fields of scien...
--- abstract: 'We investigate Riemannian (non-Kähler) Ricci flow solutions that develop finite-time Type-I singularities with the property that parabolic rescalings at the singularities converge to singularity models taking the form of shrinking Kähler–Ricci solitons. More specifically, the singularity models for these...
--- abstract: 'The resource-constrained nature of the Internet of Things (IoT) devices, poses a challenge in designing a secure, reliable, and particularly high-performance communication for this family of devices. Although side-channel resistant ciphers (either block cipher or stream cipher) are the well-suited soluti...
--- abstract: 'We aim to detect all instances of a category in an image and, for each instance, mark the pixels that belong to it. We call this task Simultaneous Detection and Segmentation (SDS). Unlike classical bounding box detection, SDS requires a segmentation and not just a box. Unlike classical semantic segmentat...
--- abstract: 'We study the effects of pressure anisotropy and heat dissipation in a spherically symmetric radiating star undergoing gravitational collapse. An exact solution of the Einstein field equations is presented in which the model has a Friedmann-like limit when the heat flux vanishes. The behaviour of the temp...
--- abstract: 'Experimental realizations of disorder in optical lattices generate a distribution of the Bose-Hubbard (BH) parameters, like on-site potentials, hopping strengths, and interaction energies. We analyze this distribution for bosons in a 2d bichromatic quasi-periodic potential by determining the generalized ...
--- abstract: 'Heavy-light mesons, heavy quarkonium and doubly heavy baryons are briefly discussed. Effective field theories (EFTs) of QCD based on the heavy quark mass expansion $1/m_Q$ provide a unified framework to describe all three systems. They produce a number of model-independent results and simplify non-pertur...
Introduction ============ Occultations of planets in the solar system by the moon receive particular attention in astronomical almanacs. They occur at semi-regular intervals of a few years’ time and, as such, they are quite common. In the 21st century there are a total of 59 cases for the classical naked-eye planets, ...
\ [ ]{} [*${}^a$ Physics Department, Theory Unit, CERN,\ CH -1211, Geneva 23, Switzerland;\ `sergio.ferrara@cern.ch`\ `Alessio.Marrani@cern.ch`*]{} [*${}^b$ INFN - Laboratori Nazionali di Frascati,\ Via Enrico Fermi 40, I-00044 Frascati, Italy*]{} [*${}^c$ Department of Physics and Astronomy,\ University of Califor...
--- abstract: | We have vastly increased the statistics at intermediate redshift by surveying the thousands of quasars in the Sloan Digital Sky Survey Data-Release 7. We visually verified over 16,000 systems with $1.46 < z < 4.55$—a sample size that renders Poisson error negligible. Detailed Monte Carlo simulations...
--- abstract: 'We show that an ensemble of identical $d$-level atoms can be efficiently described by $d-1$ collective oscillator degrees of freedom in the vicinity of a product state with all atoms in the same, but otherwise arbitrary single-particle state. We apply our description to two different kinds of spin squeez...
--- abstract: | The phenomenon of quantum nucleation is studied in a ferromagnet in the presence of a magnetic field at an arbitrary angle. We consider the magnetocrystalline anisotropy with tetragonal symmetry and that with hexagonal symmetry, respectively. By applying the instanton method in the spin-coherent-sta...