## Abstract We say that two graphs __G__ and __H__ with the same vertex set commute if their adjacency matrices commute. In this article, we show that for any natural number __r__, the complete multigraph __K__ is decomposable into commuting perfect matchings if and only if __n__ is a 2‐power. Also
Closed trail decompositions of complete equipartite graphs
✍ Scribed by Andrea Burgess; Mateja Šajna
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 314 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1063-8539
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✦ Synopsis
Abstract
The complete equipartite graph \documentclass{article}\footskip=0pc\pagestyle{empty}\begin{document}$K_m * {\overline{K_n}}$\end{document} has mn vertices partitioned into m parts of size n, with two vertices adjacent if and only if they are in different parts. In this paper, we determine necessary and sufficient conditions for the existence of a decomposition of \documentclass{article}\footskip=0pc\pagestyle{empty}\begin{document}$K_m * {\overline{K_n}}$\end{document} into closed trails of length k. © 2009 Wiley Periodicals, Inc. J Combin Designs 17: 374–403, 2009
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