给出了两个伴随最小实根不小于-4的图伴随等价的一个充分必要条件.据此,也给出了这些图的补图色等价的一个充分必要条件.
A necessary and sufficient condition for the adjoint equivalence of two graphs with the adjoint minimum real root at least -4 was given. Based on this result, a necessary and sufficient condition of the chromatic equivalence for the complement graphs of these graphs can be naturally obtained.