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A rigidity property for the homotopy invariant stable linear framed presheaves is established. As a consequence a variant of Gabber rigidity theorem is obtained for a cohomology theory representable in the motivic stable homotopy category…

K理论与同调 · 数学 2018-04-04 Alexey Ananyevskiy , Andrei Druzhinin

In this paper we prove convergence results for the homogenization of the Dirichlet problem with rapidly oscillating boundary data in convex polygonal domains. Our analysis is based on integral representation of solutions. Under a certain…

偏微分方程分析 · 数学 2015-06-16 Hayk Aleksanyan , Henrik Shahgholian , Per Sjölin

We review observational tests for the homogeneity of the Universe on large scales. Redshift and peculiar velocity surveys, radio sources, the X-Ray Background, the Lyman-$\alpha$ forest and the Cosmic Microwave Background are used to set…

天体物理学 · 物理学 2007-05-23 Ofer Lahav

This article is concerned with classes of relational structures that are closed under taking substructures and isomorphism, that have the joint embedding property, and that furthermore have the Ramsey property, a strong combinatorial…

组合数学 · 数学 2015-05-28 Manuel Bodirsky

Dense image matching aims to find a correspondent for every pixel of a source image in a partially overlapping target image. State-of-the-art methods typically rely on a coarse-to-fine mechanism where a single correspondent hypothesis is…

计算机视觉与模式识别 · 计算机科学 2025-09-24 Matthieu Vilain , Rémi Giraud , Yannick Berthoumieu , Guillaume Bourmaud

We demonstrate that the proper homotopy equivalence relation for locally finite graphs is Borel complete. Furthermore, among the infinite graphs, there is a comeager equivalence class. As corollaries, we obtain the analogous results for the…

逻辑 · 数学 2025-11-13 Hannah Hoganson , Jenna Zomback

We prove an analogue for homogeneous trees and certain affine buildings of a result of Bourgain on pinned distances in sets of positive density in Euclidean spaces. Furthermore, we construct an example of a non-homogeneous tree with…

组合数学 · 数学 2019-07-15 M. Björklund , A. Fish , J. Parkinson

We prove a version of a small index property theorem for strong amalgamation classes. Our result builds on an earlier theorem by Lascar and Shelah (in their case, for saturated models of uncountable first-order theories). We then study…

逻辑 · 数学 2017-10-10 Zaniar Ghadernezhad , Andrés Villaveces

Various methods have been proposed to enhance image quality in ultrafast ultrasound. Coherent compounding can improve image quality using multiple steered diverging transmits when motion occurring between transmits is corrected for.…

The usual coherence theorem of MacLane for categories with multiplication assumes that a certain pentagonal diagram commutes in order to conclude that associativity isomorphisms are well defined in a certain practical sense. The practical…

范畴论 · 数学 2013-09-04 Matthew G. Brin

Coherence and correlations represent two related properties of a compound system. The system can be, for instance, the polarization of a photon, which forms part of a polarization-entangled two-photon state, or the spatial shape of a…

量子物理 · 物理学 2015-12-01 Jiří Svozilík , Adam Vallés , Jan Peřina , Juan P. Torres

The notion of the Haagerup approximation property, originally introduced for von Neumann algebras equipped with a faithful normal tracial state, is generalized to arbitrary von Neumann algebras. We discuss two equivalent characterisations,…

算子代数 · 数学 2014-04-11 Martijn Caspers , Rui Okayasu , Adam Skalski , Reiji Tomatsu

A new approach is suggested for the study of geometric symmetries in general relativity, leading to an invariant characterization of the evolutionary behaviour for a class of Spatially Homogeneous (SH) vacuum and orthogonal $\gamma -$law…

广义相对论与量子宇宙学 · 物理学 2009-11-11 Pantelis S. Apostolopoulos

This work is a follow-up to our previous work "A numerical approach related to defect-type theories for some weakly random problems in homogenization" (preprint available on this archive). It extends and complements, both theoretically and…

偏微分方程分析 · 数学 2010-05-24 Arnaud Anantharaman , Claude Le Bris

Economic choices are often stochastic: the same person may make a different choice when facing the same alternatives repeatedly. Standard models assume that the degree of randomness reflects the size of utility differences, but choice…

理论经济学 · 经济学 2026-05-05 Shuhua Si

In this paper we provide a positive answer to a conjecture due to A. J. Di Scala, A. Loi, H. Hishi (see [3, Conjecture 1]) claiming that a simply-connected homogeneous K\"ahler manifold M endowed with an integral K\"ahler form $\mu\omega$,…

微分几何 · 数学 2016-06-30 Andrea Loi , Roberto Mossa

Suppose $k\nmid n$ and $H$ is an $n$-vertex $k$-uniform hypergraph. A near perfect matching in $H$ is a matching of size $\lfloor n/k\rfloor$. We give a divisibility barrier construction that prevents the existence of near perfect matchings…

组合数学 · 数学 2016-11-02 Jie Han

For a homogeneous space X (not necessarily principal) of a connected algebraic group G (not necessarily linear) over a number field k, we prove a theorem of strong approximation for the adelic points of X in the Brauer-Manin set. Namely,…

数论 · 数学 2021-03-08 Mikhail Borovoi , Cyril Demarche

After exhaustive inspection of bosonic coherent states appearing in physical literature two of us, Horzela and Szafraniec, came in 2012 to the reasonably general definition which relies exclusively on reproducing kernels. The basic feature…

数学物理 · 物理学 2018-06-26 K. Górska , A. Horzela , F. H. Szafraniec

Coherent states in a projected Hilbert space have many useful properties. When there are conserved quantities, a representation of the entire Hilbert space is not necessary. The same issue arises when conditional observations are made with…

量子物理 · 物理学 2016-12-28 P. D. Drummond , M. D. Reid