Combinatorics Seminar - Stefan Felsner

16:00-18:00

Speaker: Stefan Felsner

Title: Combinatorics of Pseudocircle Arrangements

Abstract: In this talk we survey results for pseudocircle arrangements. Along the way we present several open problems.
Among others we plan to touch the following topics:
 * The taxonomy of classes of pseudocircle arrangements.
 * The facial structure with emphasis on triangles and digons.
 * Circularizability.
 * Coloring problems for pseudocircle arrangements.
The talk includes work of Grünbaum, Snoeyink, Pinchasi, Scheucher, and others.