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We refine the intersection product in homology to an equivariant setting, which unifies several known constructions. As an application, we give a common generalisation of the Chas-Sullivan string product on a manifold and the…

Algebraic Topology · Mathematics 2017-08-03 Shizuo Kaji , Haggai Tene

We prove that some of the classical homological stability results for configuration spaces of points in manifolds can be lifted to motivic cohomology.

Algebraic Topology · Mathematics 2023-04-11 Geoffroy Horel , Martin Palmer

We investigate the averaging problem in cosmology as the problem of introducing a distance between spaces. We first introduce the spectral distance, which is a measure of closeness between spaces defined in terms of the spectra of the…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Masafumi Seriu

We give a concrete method to explicitly compute the rational cohomology of the unordered configuration spaces of connected, oriented, closed, even-dimensional manifolds of finite type which we have implemented in Sage [S+09]. As an…

Algebraic Topology · Mathematics 2016-12-20 Megan Maguire , with Appendix by Matthew Christie , Derek Francour

We construct a new type of spectral sequences for the mixed Hodge structures on the cohomology of locally symmetric varieties. These spectral sequences converge to the edge components in the Hodge triangles, and the E1-terms are expressed…

Algebraic Geometry · Mathematics 2025-03-04 Shouhei Ma

We investigate a special kind of contraction of symmetric spaces (respectively, of Lie triple systems), called homotopy. In this first part of a series of two papers we construct such contractions for classical symmetric spaces in an…

Differential Geometry · Mathematics 2012-03-06 Wolfgang Bertram , Pierre Bieliavsky

In this paper configuration spaces of smooth manifolds are considered. The accent is made on actions of certain groups (mostly $p$-tori) on this spaces by permuting their points. For such spaces the cohomological index, the genus in the…

Algebraic Topology · Mathematics 2011-07-06 R. N. Karasev

A decomposition space (also called 2-Segal space) is a simplicial object satisfying an exactness condition weaker than the Segal condition: just as the Segal condition expresses composition, the new condition expresses decomposition. It is…

Combinatorics · Mathematics 2024-10-18 Imma Gálvez-Carrillo , Joachim Kock , Andrew Tonks

The purpose of this paper is to study convergence of Monge-Ampere measures associated to sequences of plurisubharmonic functions defined on a hyperconvex subset of ${\mathbb C^n}$.

Complex Variables · Mathematics 2007-05-23 Urban Cegrell

Let $S$ denote the graded polynomial ring $\C[x_1,...,x_m]$. We interpret a chain complex of free $S$-modules having finite length homology modules as an $S^1$-equivariant map $\C^m\sm\{0\} \to X$, where $X$ is a moduli space of exact…

Algebraic Topology · Mathematics 2009-11-17 T. B. Williams

Let $\mathcal X$ be an RD-space, which means that $\mathcal X$ is a space of homogeneous type in the sense of Coifman-Weiss with the additional property that a reverse doubling property holds in $\mathcal X$. The aim of the present paper is…

Classical Analysis and ODEs · Mathematics 2015-04-10 Luong Dang Ky

With a large amount of open satellite multispectral imagery (e.g., Sentinel-2 and Landsat-8), considerable attention has been paid to global multispectral land cover classification. However, its limited spectral information hinders further…

Computer Vision and Pattern Recognition · Computer Science 2019-07-09 Danfeng Hong , Naoto Yokoya , Jocelyn Chanussot , Xiao Xiang Zhu

Operadic tangent cohomology generalizes the existing cohomology theories of Chevalley--Eilenberg, Hochschild, and Harrison to address the deformation theory of general types of algebras through gadgets known as deformation complexes. The…

Algebraic Topology · Mathematics 2026-03-12 José Moreno-Fernández , Pedro Tamaroff

It has previously been hypothesized, and supported with some experimental evidence, that deeper representations, when well trained, tend to do a better job at disentangling the underlying factors of variation. We study the following related…

Machine Learning · Computer Science 2012-07-19 Yoshua Bengio , Grégoire Mesnil , Yann Dauphin , Salah Rifai

Using the topological technique of diagrams of spaces, we calculate the homology of the union and the complement of finite arrangements of subspaces of the form $D + SP^{n-d}(X)$ in symmetric products $SP^n(X)$ where $D\in SP^d(X)$. As an…

Combinatorics · Mathematics 2007-05-23 Pavle Blagojevic , Vladimir Grujic , Rade Zivaljevic

Given a perversity function in the sense of intersection homology theory, the method of intersection spaces assigns to certain oriented stratified spaces cell complexes whose ordinary reduced homology with real coefficients satisfies…

Algebraic Topology · Mathematics 2019-10-23 Markus Banagl , Eugenie Hunsicker

A poset-stratified space is a pair $(S, S \xrightarrow \pi P)$ of a topological space $S$ and a continuous map $\pi: S \to P$ with a poset $P$ considered as a topological space with its associated Alexandroff topology. In this paper we show…

Algebraic Topology · Mathematics 2019-10-10 Toshihiro Yamaguchi , Shoji Yokura

Different notions on regularity of sets and of collection of sets play an important role in the analysis of the convergence of projection algorithms in nonconvex scenarios. While some projection algorithms can be applied to feasibility…

Optimization and Control · Mathematics 2023-10-24 Rubén Campoy

We say a model is continuous in utilities (resp., preferences) if small perturbations of utility functions (resp., preferences) generate small changes in the model's outputs. While similar, these two questions are different. They are only…

Theoretical Economics · Economics 2024-03-05 Pablo Schenone

We develop an analog to the ends of a metric space for the category of coarse metric spaces and show that it is equivalent to a previously defined coarse invariant.

Metric Geometry · Mathematics 2013-03-05 Michael DeLyser , Brendon LaBuz , Michel Tobash