English

Sectional category and The Fixed Point Property

Algebraic Topology 2021-01-26 v2

Abstract

For a Hausdorff space XX, we exhibit an unexpected connection between the sectional number of the Fadell-Neuwirth fibration π2,1X:F(X,2)X\pi_{2,1}^X:F(X,2)\to X, and the fixed point property (FPP) for self-maps on XX. Explicitly, we demonstrate that a space XX has the FPP if and only if 2 is the minimal cardinality of open covers {Ui}\{U_i\} of XX such that each UiU_i admits a continuous local section for π2,1X\pi_{2,1}^X. This characterization connects a standard problem in fixed point theory to current research trends in topological robotics.

Keywords

Cite

@article{arxiv.1912.03448,
  title  = {Sectional category and The Fixed Point Property},
  author = {Cesar A. Ipanaque Zapata and Jesús González},
  journal= {arXiv preprint arXiv:1912.03448},
  year   = {2021}
}

Comments

16 pages

R2 v1 2026-06-23T12:38:46.602Z