digraph

di-, 二。graph, 写，字母，图像。

digraph (n.)

1788, in linguistics, from Greek di- "twice" (see di- (1)) + -graph "something written," from Greek graphe "writing," from graphein "to write, express by written characters," earlier "to draw, represent by lines drawn" (see -graphy). In mathematics, from 1955, a contraction of directed graph.

1. A digraph D is unilateral.

有向图D是单连的.

2. We shall abbreviate'directed graph'to digraph.

我们将把“有方向的图”简称为方向图.

3. A digraph D is hamiltonian if D contains a hamilton directed cycle.

如果D中含有一个哈密尔顿有向圈,则称D为哈密尔顿有向图.

4. There fore we study the kings of locally semicomplete digraph by its characterization.

文章通过研究局部半完全有向图的结构定理,分类讨论了它中的王.