Mittagsseminar (in cooperation with A. Steger, D. Steurer and B. Sudakov)

Date and Time: Thursday, December 02, 2010, 12:15 pm

Duration: This information is not available in the database

Location: OAT S15/S16/S17

Speaker: Ueli Peter

Steiner Tree Approximation via Iterative Randomized Rounding

Given a weighted graph and a subset R of its vertices, the Steiner tree asks for a minimum-cost tree that connects the vertices in R. We discuss a new LP-based approximation algorithm by Byrka, Grandoni, Rothvoß and Sanità which improves the approximation ratio from 1.55 to 1.39 and introduces the method of randomized iterative rounding.

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