Semicomplete Compositions of Digraphs

Yuefang Sun

Let $T$ be a digraph with vertices $u_1,\dots ,u_t$ ($t\ge 2$) and let $H_1,\dots ,H_t$ be digraphs such that $H_i$ has vertices $u_{i,j_i},1\le j_i\le n_i.$ Then the compositi…