On potentially $K_{r+1}-U$-graphical Sequences

Chunhui Lai, Guiying Yan

Let $K_m-H$ be the graph obtained from $K_m$ by removing the edges set $E(H)$ of the graph $H$ ($H$ is a subgraph of $K_m$). We use the symbol $Z_4$ to denote $K_4-P_2.$ A se…