Discussiones Mathematicae Graph Theory 28(2) (2008)
SOLUTION TO THE PROBLEM OF KUBESA
Faculty of Applied Mathematics
AGH University of Science and Technology
Mickiewicza 30, 30-059, Kraków, Poland
AbstractAn infinite family of T-factorizations of complete graphs K2n, where 2n = 56k and k is a positive integer, in which the set of vertices of T can be split into two subsets of the same cardinality such that degree sums of vertices in both subsets are not equal, is presented. The existence of such T-factorizations provides a negative answer to the problem posed by Kubesa.
Keywords: tree, T-factorization, degree sequence.
2000 Mathematics Subject Classification: 05C70, 05C05, 05C07.
|||D. Froncek and T. Kovarova, Personal communication, 2004-6.|
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Received 9 January 2008
Revised 11 February 2008
Accepted 11 February 2008