A semicomplete multipartite digraph is obtained by replacing each edge of a complete multipartite graph by an arc or by a pair of two mutually opposite arcs.

摘要 用一条弧或一对方向相反的弧代多部无向的每一条所到的有向被称为是半多部有向。

G-designs of complete multipartite graph with G has five points-four edges or five points-five edges is studied.

讨论了多部的G设计的存在性，其中G是五点四和五点五。