Professor Magnus Bordewich m.j.r.bordewich@durham.ac.uk
Professor
We analyse the mixing time of Markov chains using path coupling with stopping times. We apply this approach to two hypergraph problems. We show that the Glauber dynamics for independent sets in a hypergraph mixes rapidly as long as the maximum degree ∆ of a vertex and the minimum size m of an edge satisfy m ≥ 2 ∆ + 1. We also show that the Glauber dynamics for proper q-colorings of a hypergraph mixes rapidly if m ≥ 4 and q > ∆, and if m = 3 and q ≥ 1.65 ∆. We give related results on the hardness of exact and approximate counting for both problems.
Journal Article Type | Article |
---|---|
Publication Date | May 1, 2008 |
Deposit Date | Dec 21, 2009 |
Journal | Random Structures and Algorithms |
Print ISSN | 1042-9832 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 32 |
Issue | 3 |
Pages | 375-399 |
DOI | https://doi.org/10.1002/rsa.20204 |
Keywords | Path coupling, Markov chain Monte Carlo, Hypergraph coloring, Hypergraph independent set. |
Public URL | https://durham-repository.worktribe.com/output/1546563 |
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