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We show that $v_n$-periodic homotopy groups detect homotopy equivalences between simply-connected finite CW-complexes.

Algebraic Topology · Mathematics 2019-07-18 Tobias Barthel , Gijs Heuts , Lennart Meier

This paper lays the foundations of an approach to applying Gromov's ideas on quantitative topology to topological data analysis. We introduce the "contiguity complex", a simplicial complex of maps between simplicial complexes defined in…

Computational Geometry · Computer Science 2014-01-20 Andrew J. Blumberg , Michael A. Mandell

The usual construction of a CW-approximation is functorial up to homotopy, but it is not functorial. In this note, we construct a functorial CW-approximation. Our construction takes inclusions of subspaces into inclusions of subcomplexes,…

Algebraic Topology · Mathematics 2015-08-11 Philip S. Hirschhorn

Let X be a compact nonsingular real algebraic variety. We prove that if a continuous map from X into the unit p-sphere is homotopic to a continuous rational map, then, under certain assumptions, it can be approximated in the compact-open…

Algebraic Geometry · Mathematics 2016-02-08 Wojciech Kucharz

This paper defines an invariant associated to Whitehead's certain exact sequence of a simply connected CW-complex which is much more elementary - and less powerful - than the boundary invariant of Baues. Nevertheless, in good cases, it…

Algebraic Topology · Mathematics 2018-04-24 Mahmoud Benkhalifa

Implementing an idea due to John Baez and James Dolan we define new invariants of Whitney stratified manifolds by considering the homotopy theory of smooth transversal maps. To each Whitney stratified manifold we assign transversal homotopy…

Algebraic Topology · Mathematics 2009-10-20 Jonathan Woolf

Let A and B be normal matrices with coefficients that are continuous complex-valued functions on a topological space X that has the homotopy type of a CW complex, and suppose these matrices have the same distinct eigenvalues at each point…

Operator Algebras · Mathematics 2018-12-31 Greg Friedman , Efton Park

In a previous paper, under the assumption that the Riemannian metric is special, the author proved some results about the moduli spaces and CW structures arising from Morse theory. By virtue of topological equivalence, this paper extends…

Geometric Topology · Mathematics 2023-10-06 Lizhen Qin

In this article we study two "strong" topologies for spaces of smooth functions from a finite-dimensional manifold to a (possibly infinite-dimensional) manifold modeled on a locally convex space. Namely, we construct Whitney type topologies…

General Topology · Mathematics 2018-05-14 Eivind Otto Hjelle , Alexander Schmeding

We prove that holomorphic maps from an open subset of a complex smooth projective curve to a complex smooth projective rationally simply connected variety can be approximated by algebraic maps for the compact-open topology. This theorem can…

Algebraic Geometry · Mathematics 2025-08-22 Olivier Benoist , Olivier Wittenberg

We prove that the group of homotopy classes of relative homotopy automorphisms of a simply connected finite CW-complex is finitely presented and that the rationalization map from this group to its rational analogue has a finite kernel.

Algebraic Topology · Mathematics 2024-02-28 Hadrien Espic , Bashar Saleh

Globular CW-complexes and flows are both geometric models of concurrent processes which allow to model in a precise way the notion of dihomotopy. Dihomotopy is an equivalence relation which preserves computer-scientific properties like the…

Algebraic Topology · Mathematics 2021-08-25 Philippe Gaucher

The state spaces of machines admit the structure of time. A homotopy theory respecting this additional structure can detect machine behavior unseen by classical homotopy theory. In an attempt to bootstrap classical tools into the world of…

Algebraic Topology · Mathematics 2008-12-05 Sanjeevi Krishnan

To a digraph with a choice of certain integral basis, we construct a CW complex, whose integral singular cohomology is canonically isomorphic to the path cohomology of the digraph as introduced in \cite{GLMY}. The homotopy type of the CW…

Combinatorics · Mathematics 2014-09-23 An Huang , Shing-Tung Yau

We develop a generalization of manifold calculus in the sense of Goodwillie-Weiss where the manifold is replaced by a simplicial complex. We consider functors from the category of open subsets of a fixed simplical complex into the category…

Geometric Topology · Mathematics 2017-11-21 Steffen Tillmann

The fine curve complex of a surface is a simplicial complex whose vertices are essential simple closed curves and whose $k$-simplices are collections of $k+1$ disjoint curves. We prove that the fine curve complex is homotopy equivalent to…

Geometric Topology · Mathematics 2026-02-11 Ryan Dickmann , Zachary Himes , Alexander Nolte , Roberta Shapiro

We show that every continuous map from one translationally finite tiling space to another can be approximated by a local map. If two local maps are homotopic, then the homotopy can be chosen so that every interpolating map is also local.

Dynamical Systems · Mathematics 2018-07-10 Betseygail Rand , Lorenzo Sadun

Fiedorowicz suggested that it was likely that every finite simply connected CW complex is homotopy equivalent to the classifying space of a finite semigroup. We prove that every finite wedge of simply connected Moore spaces of finitely…

Group Theory · Mathematics 2025-11-18 Aris Martinian , Benjamin Steinberg

Let X be a real algebraic subset of R^n and M a smooth, closed manifold. We show that all continuous maps from M to X are homotopic (in X) to C^\infty maps. We apply this result to study characteristic classes of vector bundles associated…

Algebraic Topology · Mathematics 2014-10-14 Thomas Baird , Daniel A. Ramras

Let M be a real analytic manifold, F a bounded complex of constructible sheaves. We show that the Whitney-de Rham complex associated to F is quasi-isomorphic to F.

Algebraic Geometry · Mathematics 2016-04-13 Luca Prelli