Department of Computer Science | Institute of Theoretical Computer Science | CADMO
Prof. Emo Welzl and Prof. Bernd Gärtner
Mittagsseminar Talk Information |
Date and Time: Tuesday, February 21, 2023, 12:15 pm
Duration: 30 minutes
Location: CAB G51
Speaker: Bernhard Haeupler
Expander Decompositions have become one of the most ubiquitous, elegant, and versatile tools for fast graph algorithms. Hop-Constrained Expanders are a recent powerful generalization of expanders. They capture not just (\ell^\infty-quantities like) flows, congestion, and cuts but simultaneously also control (\ell ^{1}-quantities like) lengths and costs. Hop-Constrained Expanders majorly extend the problems expanders and expander decompositions can be used for. This talk gives an introduction to expanders and hop-constrained expanders, their expander decompositions, and some graph algorithms build on them (e.g., (h-hop) oblivious routing, dynamic distance oracles, and fast multi-commodity-flow approximation algorithms).
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