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Edge condition for hamiltonicity in balanced tripartite graphs

Adamus J.

Opuscula Mathematica

2009

Vol. 29, no. 4

337-343

A well-known theorem of Entringer and Schmeichel asserts that a balanced bipartite graph of order 2n obtained from the complete balanced bipartite Kn,n by removing at most n - 2 edges, is bipancyclic. We prove an analogous result for balanced tripartite graphs: If G is a balanced tripartite graph of order 3n and size at least 3n(2) - 2n + 2, then G contains cycles of all lengths.