English

The fixed point property in every weak homotopy type

Algebraic Topology 2013-07-09 v1 Combinatorics

Abstract

The Brouwer fixed point theorem states that the disk DnD^n has the fixed point property. More generally, by the Lefschetz fixed point theorem any compact ANR with trivial rational homology has the fixed point property. In this note we prove that for any connected compact CW-complex KK there exists a space XX weak homotopy equivalent to KK which has the fixed point property. The result is known to be false if we require XX to be a polyhedron. The space XX we construct is a non-Hausdorff space with finitely many points.

Keywords

Cite

@article{arxiv.1307.1722,
  title  = {The fixed point property in every weak homotopy type},
  author = {Jonathan Ariel Barmak},
  journal= {arXiv preprint arXiv:1307.1722},
  year   = {2013}
}

Comments

12 pages, 2 figures

R2 v1 2026-06-22T00:46:27.366Z