Seminar "Geometry and Combinatorics"

Helly-type theorems, new and very new

Europe/Moscow
14 line 120

14 line 120

Description

It was clear for Eduard Helly himself that his celebrated  theorem (about intersection patterns of convex bodies)

remains true if convexity requirment is replaced by a much milder topological  condition. 

 

We shall discuss topological Helly theorem, its colored version, matroidal version and  related topics, including open questions.