On large regular (1,1,k)-mixed graphs

C. Dalfó, G. Erskine, G. Exoo +4

An $(r,z,k)$-mixed graph $G$ has every vertex with undirected degree $r$, directed in- and out-degree $z$, and diameter $k$. In this paper, we study the case $r=z=1$, proposing som…