Abstract#R##N##R##N#We give examples of edge-chromatic critical graphs G of the following types: (i) of even order and having no 1-factor, and (ii) of odd order and having a vertex v of minimum degree such that G − v has no 1-factor. The first disproves a conjecture of S. Fiorini and R. J. Wilson, and the second answers a question of A. G. Chetwynd and H. P. Yap in the negative. © 1993 John Wiley & Sons, Inc.
['Sheshayya A. Choudum']
Edge-chromatic critical graphs and the existence of 1-factors