The existence of even factors based on spectral conditions of graphs

Jiasheng Li, Xiaoyun Lv, Shoujun Xu

Let $G=(V(G),E(G))$ be a graph with vertex set $V(G)$ and edge set $E(G)$. An even factor of $G$ is a spanning subgraph $F$ such that every vertex in $F$ has a nonzero even degree…