■类整谱图

A intergral graphs of the class ■

图G是一个简单图,图G的补图记为■,如果G的谱完全由整数组成,我们就说G是整谱图.G=Ka,b是完全二部图,本文确定了图类■中的所有的整谱图.

Let G be a simple graph and let G denote its complement.We say that G is integral if its spectnm consists entirely of integers. Let G=Ka,b denote the complete bipartite graph. In this paper was determined all the integral graphs of ^- αKα,b .