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, D. Steurer and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Thursday, March 03, 2022, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Christoph Grunau

A Near-Optimal Deterministic Parallel Algorithm for (1+eps)-Approximate Shortest Paths

In this talk, I'm gonna present a near-optimal deterministic parallel algorithm for computing (1+eps)-approximate single-source shortest paths in any undirected weighted graph. The high-level idea of the algorithm is a local iterative approach to reduce shortest path computiations "up to distance D" to computing low-diameter decompositions "up to distance D/2". The algorithm also makes use of a boosting framework for transshipment (see Goran's talk). The presented result is based on joint work with Vaclav Rozhon, Bernhard Haeupler, Goran Zuzic and Jason Li.


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