Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

 Mittagsseminar Talk Information

Date and Time: Thursday, May 11, 2017, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Kilian Risse

Phases of Unique Sink Orientations and Their Role in Finding the Sink

A unique sink orientation (USO) is an orientation of the $n$-dimensional hypercube such that every nonempty face has a unique sink. The main algorithmic problem is to find the global sink of the USO. A phase of a USO is an edge set that needs to be reoriented together in order to uphold the USO property. In this talk I show how phase discovery algorithms can be used to find the unique global sink. Further I discuss a simple randomized sink finding algorithm.

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