Sharp conditions for the existence of an even $[a,b]$-factor in a graph

Eun-Kyung Cho, Jong Yoon Hyun, Suil O +1

Let $a$ and $b$ be positive integers. An even $[a,b]$-factor of a graph $G$ is a spanning subgraph $H$ such that for every vertex $v\in V(G)$, $d_H(v)$ is even and $a \le d_H(v) \…