Simplicial Lusternik–Schnirelmann category
- Fernandez-Ternero, Desamparados
- Macías-Virgós, Enrique
- Minuz, Erica
- Vilches Alarcón, José Antonio
ISSN: 0214-1493
Year of publication: 2019
Volume: 63
Issue: 1
Pages: 265-293
Type: Article
More publications in: Publicacions matematiques
Abstract
The simplicial LS-category of a finite abstract simplicial complex is a new invariant of the strong homotopy type, defined in purely combinatorial terms. We prove that it generalizes to arbitrary simplicial complexes the well known notion of arboricity of a graph, and that it allows to develop many notions and results of algebraic topology which are costumary in the classical theory of Lusternik–Schnirelmann category. Also we compare the simplicial category of a complex with the LS-category of its geometric realization and we discuss the simplicial analogue of the Whitehead formulation of the LS-category.