Kapuhennayake, K.M.P.G.S.C.; Perera, A.A.I.
(Faculty of Science, University of Ruhuna, Matara, Sri Lanka, 2021-02-17)
The chromatic polynomial is introduced by George David Birkhoff in 1912. It defined as follows: for a given graph G, the number of ways of colouring the vertices with k colours, such that any two adjacent vertices are ...