(1) Department of Mathematics, Beijing Jiaotong University, Beijing, 100044, China
Abstract:
In this paper,a new method is used to calculate the chromatic polynomials of graphs.The chro-matic polynomials of the complements of a wheel and a fan are determined.Furthermore,the adjoint polynomialsof F_n with n vertices are obtained.This supports a conjecture put forward by R.Y.Liu et al.