Edge list multicoloring trees: An extension of Hall's theorem
Mathew Cropper, András Gyárfás, Jenő Lehel · Journal of Graph Theory · 2003
Abstract We prove a necessary and sufficient condition for the existence of edge list multicoloring of trees. The result extends the Halmos–Vaughan generalization of Hall's theorem on the existence of distinct representatives of sets. © 2003 Wiley Periodicals, Inc. J Graph Theory 42: 246–255, 2003