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 A. Steger, D. Steurer and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Tuesday, June 13, 2006, 12:15 pm

Duration: This information is not available in the database

Location: OAT S15/S16/S17

Speaker: Dominic Meier

On Enumerating Minimal Dicuts and Strongly Connected Subgraphs

By Endre Boros, Khaled Elbassioni, Vladimir Gurvich and Leonid Khachiyan (submitted)

Given a strongly connected directed graph, the paper analyses the complexities for generating two families of subgraphs. There are two main results, the first of which is that all minimal strongly connected subgraphs can be enumerated in incremental polynomial time. On the other side, the second result states that enumerating all minimal directed cuts is NP-hard (given a collection of minimal directed cuts, it is NP-hard to tell whether it is complete). The family of minimal directed cuts is in some sense dual to the family of minimal strongly connected subgraphs.

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