On Isomorphisms of Tetravalent Cayley Digraphs over Dihedral Groups

Jin-Hua Xie, Zai Ping Lu, Yan-Quan Feng

Let $m$ be a positive integer. A group $G$ is said to be an $m$-DCI-group or an $m$-CI-group if $G$ has the $k$-DCI property or $k$-CI property for all positive integers $k$ at mos…