Discrete Mathematics & Theoretical Computer Science, Vol 4, No 2 (2001)

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DMTCS vol 4 no 2 (2001), pp. 133-138

Discrete Mathematics & Theoretical Computer Science


Volume 4 n° 2 (2001), pp. 133-138

author:C. R. Subramanian
title:Paths of specified length in random k-partite graphs
keywords:random graphs, paths, bijections
abstract:Fix positive integers k and l. Consider a random k-partite graph on n vertices obtained by partitioning the vertex set into Vi, (i=1, ... ,k) each having size Ω(n) and choosing each possible edge with probability p. Consider any vertex x in any Vi and any vertex y. We show that the expected number of simple paths of even length l between x and y differ significantly depending on whether y belongs to the same Vi (as x does) or not. A similar phenomenon occurs when l is odd. This result holds even when k,l vary slowly with n. This fact has implications to coloring random graphs. The proof is based on establishing bijections between sets of paths.

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reference: C. R. Subramanian (2001), Paths of specified length in random k-partite graphs, Discrete Mathematics and Theoretical Computer Science 4, pp. 133-138
bibtex:For a corresponding BibTeX entry, please consider our BibTeX-file.
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