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We consider the averaging process on the discrete $d$-dimensional torus. On this graph, the process is known to converge to equilibrium on diffusive timescales, not exhibiting cutoff. In this work, we refine this picture in two ways.…

Probability · Mathematics 2024-07-02 Federico Sau

This paper is a companion paper to [Lipman and Daubechies 2011]. We provide numerical procedures and algorithms for computing the alignment of and distance between two disk type surfaces. We provide a convergence analysis of the discrete…

Numerical Analysis · Mathematics 2014-02-18 Yaron Lipman , Jesus Puente , Ingrid Daubechies

A two-component link produces a torus as the product of the component knots in a two-point configuration space of a three-sphere. This space can be identified with a cotangent bundle and also with an indefinite Grassmannian. We show that…

Geometric Topology · Mathematics 2016-03-21 Jun O'Hara

We introduce a parametrized version of scissors congruence $K$-theory of manifolds with tangential structure, which includes a topologized version of the scissors congruence $K$-theory of oriented manifolds as a special case. We examine the…

Algebraic Topology · Mathematics 2026-04-03 Mona Merling , George Raptis , Julia Semikina

Torus manifolds are topological generalization of smooth projective toric manifolds. We compute the rational cohomology ring of a class of smooth locally standard torus manifolds whose orbit space is a connected sum of simple polytopes.

Algebraic Topology · Mathematics 2018-12-10 Soumen Sarkar , Donald Stanley

The concept of pseudo-distance-regularity around a vertex of a graph is a natural generalization, for non-regular graphs, of the standard distance-regularity around a vertex. In this note, we prove that a pseudo-distance-regular graph…

Combinatorics · Mathematics 2012-05-28 M. A. Fiol

The set of covariance matrices equipped with the Bures-Wasserstein distance is the orbit space of the smooth, proper and isometric action of the orthogonal group on the Euclidean space of square matrices. This construction induces a natural…

Differential Geometry · Mathematics 2022-04-22 Yann Thanwerdas , Xavier Pennec

We study the mod $2$ cohomology of real Calabi-Yau threefolds given by real structures which preserve the torus fibrations constructed by Gross. We extend the results of Casta\~no-Bernard-Matessi and Arguz-Prince to the case of real…

Algebraic Geometry · Mathematics 2024-02-21 Diego Matessi

We calculate geometric and homotopical (or stable) bordism rings associated to semi-free $S^1$ actions on complex manifolds, giving explicit generators for the geometric theory. The classification of semi-free actions with isolated fixed…

Algebraic Topology · Mathematics 2007-05-23 Dev P. Sinha

Given a set of people and a set of events they attend, we address the problem of measuring connectedness or tie strength between each pair of persons given that attendance at mutual events gives an implicit social network between people. We…

Social and Information Networks · Computer Science 2011-12-14 Mangesh Gupte , Tina Eliassi-Rad

In this manuscript we present how to collapse a manifold equipped with a closed flat regular Riemannian foliation with leaves of positive dimension, while keeping the sectional curvature uniformly bounded from above and below. From this…

Differential Geometry · Mathematics 2026-01-16 Diego Corro

On smooth manifolds of dimension $n \ge 4$, we prove that the torsion and curvature are, up to a scalar factor, the only pair of a vector-valued 2-form and an endomorphism-valued 2-form naturally associated with a linear connection that…

Differential Geometry · Mathematics 2025-12-01 Raúl Martínez Bohórquez , José Navarro , Juan B. Sancho

We prove some necessary conditions for a link to be either concordant to a quasi-positive link, quasi-positive, positive, or the closure of a positive braid. The main applications of our results are a characterisation of positive links with…

Geometric Topology · Mathematics 2023-11-14 Carlo Collari

The slope is an isotopy invariant of colored links with a distinguished component, initially introduced by the authors to describe an extra correction term in the computation of the signature of the splice. It appeared to be closely related…

Geometric Topology · Mathematics 2024-08-21 Alex Degtyarev , Vincent Florens , Ana G. Lecuona

In this work, it is shown that a simply-connected, rationally-elliptic torus orbifold is equivariantly rationally homotopy equivalent to the quotient of a product of spheres by an almost-free, linear torus action, where this torus has rank…

Differential Geometry · Mathematics 2018-10-02 Fernando Galaz-Garcia , Martin Kerin , Marco Radeschi , Michael Wiemeler

V.V. Sharko in his papers and books has investigated functions on manifolds and cobordism. Braids intimately connect with functions on manifolds. These connections are represented by mapping class groups of corresponding discs, by…

Geometric Topology · Mathematics 2022-07-18 Nikolaj Glazunov

Log-Euclidean distances are commonly used to quantify the similarity between positive definite matrices using geometric considerations. This paper analyzes the behavior of this distance when it is used to measure closeness between…

Signal Processing · Electrical Eng. & Systems 2024-08-09 Xavier Mestre , Roberto Pereira

Associated to every closed, embedded submanifold $N$ in a connected Riemannian manifold $M$, there is the distance function $d_N$ which measures the distance of a point in $M$ from $N$. We analyze the square of this function and show that…

Differential Geometry · Mathematics 2023-12-04 Somnath Basu , Sachchidanand Prasad

We give a necessary and sufficient condition for the orientability of a locally standard 2-torus manifold with a fixed point which generalizes previous results of Nakayama-Nishimura in 2005 and Soprunova-Sottile in 2013. We construct…

Algebraic Topology · Mathematics 2016-04-27 Soumen Sarkar

We compute the triply graded Khovanov-Rozansky homology of a family of links, including positive torus links and $\operatorname{Sym}^l$-colored torus knots.

Geometric Topology · Mathematics 2019-09-04 Matthew Hogancamp , Anton Mellit