Based on the eigensystem {λj, φj} of -△, the multiple solutions for nonlinear problem △u + f(u)= 0 in Ω,u = 0 on Ω......

Yousef.Alavi等人在文献[1]中定义了一种新分解（Ascending Subgraph Decomposition)，即“升分解”，并且猜想；任意有正整数条边的图都可......

本文证明了对每一个△(G)≥3的外平面图G,有X~c(G)≤△(G)+3,其中X~c(G)为G的完备色数,△(G)为G的顶点最大度。更多还原......