具有完美匹配的单圈图第二大特征值的上界(英文)

An Upper Bound on the Second Largest Eigenvalue of Unicyclic Graphs with Perfect Matchings

得到了具有完美匹配的单圈图第二大特征值的一个上界.同时也给出了具有完美匹配的单圈图的第二大特征值的最大值的一个下界.

In this paper, an upper bound for the second largest eigenvalue of a unicyclic graph with perfect matchings is obtained. At the same time, a lower bound for maximum value of the second largest eigenvalue of unicyclic graphs with perfecting matchings is also given.