Cycle Decompositions of the Complete Graph

A.J.W. Hilton1, Matthew Johnson2
1Department of Mathematics University of Reading Whiteknights P.O. Box 220 Reading RG6 6AX U.K.
2Department of Mathematics London School of Economics Houghton Street London WC2A 2AE U.K.

Abstract

For a positive integer \(n\), let \(G\) be \(K_n\) if \(n\) is odd and \(K_n\) less a one-factor if \(n\) is even. In this paper it is shown that, for non-negative integers \(p\), \(q\) and \(r\), there is a decomposition of \(G\) into \(p\) \(4\)-cycles, \(q\) \(6\)-cycles and \(r\) \(8\)-cycles if \(4p + 6q + 8r = |E(G)|\), \(q = 0\) if \(n < 6\), and \(r = 0\) if \(n < 8\).