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Lectures and Colloquia during the semester

Monday, October 23, 2006

Technische Universität Berlin
Straße des 17. Juni 136
10623 Berlin
Math building - Room MA 041
Lecture - 14:15

Günter M. Ziegler - TU Berlin

Topological Methods: Kneser and Tverberg


We discuss two classical applications of topological methods in combinatorics and discrete geometry:

Colloquium - 16:00

Felix Breuer - FU Berlin

Characterization of Closed Curves in the Plane

With every closed curve in the plane that has finitely many double points and no other multi points we can associate a chord diagram. There are several criteria that characterize the chord diagrams of crossing curves. Generalizing the approach of de Fraysseix and Ossona de Mendez, we will give two characterizations of chord diagrams of curves that can have both touching and crossing double points.

Bruno Benedetti - Genoa

Bankruptcy Rules - Compositions vs. Convex Combinations

Bankruptcy theory (dev. 1982) searches mathematical solutions to the question: “how to divide the estate of a firm that went bankrupt among his creditors?” We'll exploit a recent “physical” approach (due to M.Kaminski) to overview the known results, and to introduce a new operator which “combines” two rules together.

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