This page list all events and seminars that take place in the department this week. Please use the form below to choose a different week or date range.

Combinatorics Seminar

Conical partitions for point sets

Mar 12, 14:10—15:10, 2018, -101

Speaker

Gabor Damasdi (HUJI)

Abstract

Mass partition theorems like the Ham-Sandwich theorem have been extensively studied in recent decades. Conical partitions have been mainly considered in the planar case, but some higher dimensional results have been obtained by Vrecica and Zivaljevic and by Makeev. The proof of mass partition theorems usually follows the configuration space/test map procedure or some degree theoretic method, both of which heavily rely on topological results. This is especially true for results in higher dimensions, where our combinatorial tools are limited. We show a completely combinatorial proof for a discrete version of a theorem of Vrecica and Zivaljevic concerning conical partitions, and we show an equivalent result on the number of regions in a conical decomposition.

Research Features

טופולוגיה לא קומוטטיבית

Mar 13, 16:15—18:00, 2018, -101

Speaker

אילן הירשברג


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