Antimagic orientations of disconnected even regular graphs

Chen Song, Rong-Xia Hao

A $labeling$ of a digraph $D$ with $m$ arcs is a bijection from the set of arcs of $D$ to $\{1,2,\dots ,m\}$. A labeling of $D$ is $antimagic$ if no two vertices in $D$ have the sa…