Proof of Four Color Map Theorem by Using PRN of Graph
Haribhau R. Bhapkar, J. N. Salunke · The Bulletin of Society for Mathematical Services and Standards · 2014
This paper intends to study the relation between PRN and chromatic number of planar graphs. In this regard we investigate that isomorphic or 1 isomorphic graph may or may not have equal PRN and few other related results. Precisely, we give simple proof of Four Color Map Theorem.