Gracefulness of Some Disjoint Union of Four Circles
Yang You · Journal of China University of Mining and Technology · 2003
This paper discusses the gracefulness of 3C 4k∪C n which is the disjoint union of four circles, gives out a necessary condition for the 3C 4k∪C n to be a graceful graph, and gives the graceful labelings of 3C 4k∪C 4n+3,3C 4k∪C 4k+4,3C 8k∪C 8k-1. The result shows that they are graceful.