... directed complete graph 无向完全图 ; 有向完全图 directed flow graph 定向流图 directed tree graph 有向树图 ...
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A product type hierarchy is a strict tree, whereas a category hierarchy can be a directed acyclic graph.
产品类型层次结构是一个严格的树，而类别层次结构则是一个有方向的非循环图表。
Using it the directed tree polynomial of a directed graph G can be found conveniently and efficiently.
应用它可以方便且有效地求出一个有向图G的有向树多项式。
It is proved that the R-rotation graph of a elementary coronoid system is a multiple directed rooted tree containing at least 2 trees.
如果冠状系统是基本的，已经证明其R -旋转图至少包含2棵有向根树。
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