Cubical approximation for directed topology, II

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Authors: Sanjeevi Krishnan
Cited by: 0

Abstract

The paper establishes an equivalence between directed homotopy categories of (diagrams of) cubical sets and (diagrams of) directed topological spaces. This equivalence both lifts and extends an equivalence between classical homotopy categories of cubical sets and topological spaces. Some simple applications include combinatorial descriptions and subsequent calculations of directed homotopy monoids and directed singular 1-cohomology monoids. Another application is a characterization of isomorphisms between small categories up to zig-zags of natural transformations as directed homotopy equivalences between directed classifying spaces. Cubical sets throughout the paper are taken to mean presheaves over the minimal symmetric monoidal variant of the cube category. Along the way, the paper characterizes morphisms in this variant as the interval-preserving lattice homomorphisms between finite Boolean lattices.

Fields of Study & Subjects

Homotopy and Cohomology in Algebraic Topology Advanced Topology and Set Theory Algebraic structures and combinatorial models

Publication details

Journal / source
Algebraic & Geometric Topology
Volume
26
Issue
1
Pages
135–199
Publication date
16 January 2026
Language
EN