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, April 07, 2022, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Michal Dory

Fault-Tolerant Labeling and Compact Routing Schemes

Assume that you have a huge graph, where edges and vertices may fail, and you want to answer questions about this graph quickly, without inspecting the whole graph. A fault-tolerant labeling scheme allows us to do just that. It is a distributed data structure, in which each vertex and edge is assigned a short label, such that given the labels of a pair of vertices s,t, and a set of failures F, you can answer questions about s and t in G\F. For example, determine if s and t are connected in G\F, just by looking at their labels. I will discuss a recent work where we show the first fault-tolerant connectivity labeling schemes for general graphs. I will also show applications for fault-tolerant routing. Here the goal is to provide each vertex a small routing table, such that given these tables we can efficiently route messages in the network, even in the presence of failures. Based on a joint work with Merav Parter.

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