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Toughness and the existence ofk-factors. II
Authors:Hikoe Enomoto
Institution:(1) Department of Information Science, Faculty of Science, University of Tokyo, Hongo, Bunkyo-ku, 113 Tokyo, Japan
Abstract:In a paper with the same title 3], we proved Chvátal's conjecture thatk-tough graphs havek-factors if they satisfy trivial necessary conditions. In this paper, we prove the following stronger result: Suppose|V(G)| ge k + 1,k sdot |V(G)| even, and|S| ge k sdot w(G – S) – 7/8k ifw(G – S) ge 2, wherew(G – S) is the number of connected components ofG – S. ThenG has ak-factor.
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