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In this paper, we present a closed formula for the cohomology of real Grassmannians. To achieve this, we use a theory of stratified spaces to compute the differentials in a chain complex that computes the cohomology. Specifically, we…

Algebraic Topology · Mathematics 2020-11-26 Eric Berry , Scotty Tilton

We study notions of generic and coarse computability in the context of computable structure theory. Our notions are stratified by the $\Sigma_\beta$ hierarchy. We focus on linear orderings. We show that at the $\Sigma_1$ level all linear…

Logic · Mathematics 2024-01-29 Wesley Calvert , Douglas Cenzer , David Gonzalez , Valentina Harizanov

For any orbifold M, we explicitly construct a simplicial complex S(M) from a given triangulation of the `coarse' underlying space together with the local isotropy groups of M. We prove that, for any local system on M, this complex S(M) has…

q-alg · Mathematics 2008-02-03 Ieke Moerdijk , Dorette A Pronk

We determine the ring structure of the loop homology of some global quotient orbifolds. We can compute by our theorem the loop homology ring with suitable coefficients of the global quotient orbifolds of the form $[M/G]$ for $M$ being some…

Algebraic Topology · Mathematics 2018-03-16 Yasuhiko Asao

In this paper we focus on various aspects of singular complex plane curves, mostly in the context of their homological properties and the associated combinatorial structures. We formulate some challenging open problems that can point to new…

Algebraic Geometry · Mathematics 2026-03-26 Michael Cuntz , Piotr Pokora

We define and study complex structures and generalizations on spaces consisting of geodesics or harmonic maps that are compatible with the symmetries of these spaces. The main results are about existence and uniqueness of such structures.

Differential Geometry · Mathematics 2019-01-14 László Lempert

Computing homology and cohomology is at the heart of many recent works and a key issue for topological data analysis. Among homological objects, homology generators are useful to locate or understand holes (especially for geometric…

Algebraic Topology · Mathematics 2025-12-22 Yann-Situ Gazull , Aldo Gonzalez-Lorenzo , Alexandra Bac

Let $(X,g)$ be a compact Riemannian stratified space with simple edge singularity. Thus a neighbourhood of the singular stratum is a bundle of truncated cones over a lower dimensional compact smooth manifold. We calculate the various…

Differential Geometry · Mathematics 2007-05-23 Eugenie Hunsicker , Rafe Mazzeo

In this article we study some interesting properties of the $q$-Analog singular homology, which is a generalization of the usual singular homology, suitably adapted to the context of $N$-complex and amplitude homology \cite{kapranov}. We…

Algebraic Topology · Mathematics 2011-08-23 Mauricio Angel , Gabriel Padilla

Following ideas of Graeme Segal, we construct an equivariant con- figuration space that is a model of equivariant connective K-homology spec- trum for finite groups, as a consequence we obtain an induction structure for equivariant…

Algebraic Topology · Mathematics 2015-06-12 Mario Velasquez

In this paper, we shall compute the chain complex and the corresponding homology of some Morse function $f$ over integer coefficients. The definition of the correct boundary operator requires a careful construction of moduli space of…

Algebraic Topology · Mathematics 2020-07-20 Mathieu Giroux

In this paper, we establish some general forms of the law of the iterated logarithm for independent random variables in a sub-linear expectation space, where the random variables are not necessarily identically distributed. Exponential…

Probability · Mathematics 2021-06-16 Li-Xin Zhang

The classifying spaces of cobordisms of singular maps have two fairly different constructions. We expose a homotopy theoretical connection between them. As a corollary we show that the classifying spaces in some cases have a simple product…

Geometric Topology · Mathematics 2019-02-27 András Szűcs , Tamás Terpai

We compute the integral homology of the space of paths in $\mathbb{C}P^n$ with endpoints in $\mathbb{R}P^n$, $n \ge 1$ and its algebra structure with respect to the Pontryagin-Chas-Sullivan product with $\mathbb{Z}/2$-coefficients.

Geometric Topology · Mathematics 2013-12-02 Nancy Hingston , Alexandru Oancea

We abstract and generalize homotopical monadicity statements, placing in a single conceptual framework a range of old and recent recognition and characterization principles in iterated loop space theory in classical, equivariant, and…

Algebraic Topology · Mathematics 2024-02-07 Hana Jia Kong , J. Peter May , Foling Zou

In a recent work, Girard proposed a new and innovative approach to computational complexity based on the proofs-as-programs correspondence. In a previous paper, the authors showed how Girard proposal succeeds in obtaining a new…

Logic in Computer Science · Computer Science 2019-06-04 Clément Aubert , Thomas Seiller

Floer theory was originally devised to estimate the number of 1-periodic orbits of Hamiltonian systems. In earlier works, we constructed Floer homology for homoclinic orbits on two dimensional manifolds using combinatorial techniques. In…

Symplectic Geometry · Mathematics 2017-06-07 Sonja Hohloch

Primitive cohomology of a Hopf algebra is defined by using a modification of the cobar construction of the underlying coalgebra. Among many of its applications, two classifications are presented. Firstly we classify all non locally PI,…

Rings and Algebras · Mathematics 2015-12-08 D. -G. Wang , J. J. Zhang , G. Zhuang

We compute the mod two homology Hopf rings of the spectra KO and KU. The spaces in these spectra are the infinite classical groups and their coset spaces, and their homology was first calculated in the Cartan seminars, but the Hopf ring…

Algebraic Topology · Mathematics 2007-05-23 Dena S. Cowen Morton , Neil P. Strickland

In the first part of this paper, we constructed a filtered U(r)-equivariant stable homotopy type called the spectrum of strict broken symmetries sB(L) of links L given by closing a braid with r strands. Evaluating this filtered spectrum on…

Algebraic Topology · Mathematics 2023-09-08 Nitu Kitchloo