理学 次模函数 释 digraph 有向图 有向图是指一个有序三元组，式中是非空的顶点集，是与不相交的弧集，是关联函数，它使的每条弧对应于的有序顶点对（不必相异)。 理学 [重名条] 释 directed graph 有向图 二元组，其中顶点集非空，有向边集（或弧集）是由的有序对构成的子集。
＞组合数学、组合设计与图论＞图论＞释义 directed graph; digraph 有向图 digraph 有向图†，双图 directed graph 有向图†
理论计算机科学 数据结构 释文 directed graph 有向图
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