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Randomly colouring graphs with lower bounds on girth and maximum degree

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2 Author(s)
Dyer, M. ; Sch. of Comput., Leeds Univ., UK ; Frieze, A.

We consider the problem of generating a random q-colouring of a graph G=(V, E). We consider the simple Glauber Dynamics chain. We show that if the maximum degree Δ>cl ln n and the girth g>c2 ln ln n (n=|V|), then this chain mixes rapidly provided C1, C2 are sufficiently large, q/A>β, where β≈1.763 is the root of β=e1β/. For this class of graphs, this beats the 11Δ/6 bound of E. Vigoda (1999) for general graphs. We extend the result to random graphs.

Published in:

Foundations of Computer Science, 2001. Proceedings. 42nd IEEE Symposium on

Date of Conference:

8-11 Oct. 2001

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