Geometric coincidence results from multiplicity of continuous maps

Details Geometric coincidence results from multiplicity of continuous maps Geometric coincidence results from multiplicity of continuous maps

2011-06-30

arxiv.org/abs/1106.6176v1

Mathematics

Geometric Topology

Scientific paper

In this paper we study geometric coincidence problems in the spirit of the following problems by B. Gr\"unbaum: How many affine diameters of a convex body in $\mathbb R^n$ must have a common point? How many centers (in some sense) of hyperplane sections of a convex body in $\mathbb R^n$ must coincide? One possible approach to such problems is to find topological reasons for multiple coincidences for a continuous map between manifolds of equal dimension. In other words, we need topological estimates for the multiplicity of a map. In this work examples of such estimates and their geometric consequences are presented.

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