Department of Computer Science | Institute of Theoretical Computer Science | CADMO

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, January 29, 2004, 12:15 pm

Duration: This information is not available in the database

Location: This information is not available in the database

Speaker: Leo Rüst

Unique Sink Orientations on Grids

Certain linear complementarity problems (LCP) can be transformed into the problem of finding the unique sink in a USO on a cube. USOs on grids can be derived from certain generalized LCPs (GLCP), where the solution to the GLCP corresponds to the unique sink in the grid-USO.
I will present some recent results about USOs on grids, including:
- A characterization which makes it possible to check efficiently if an orientation on a grid is a USO.
- The expected running time of the algorithm Random Facet, which finds the unique sink on a grid-USO.


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