transitive closure

• 传递闭包

transitive closure的用法和样例：

例句

1. The set of reachable objects is the transitive closure of the root set under the points-to relation.
   可到达的对象集是指向关系下根集的传递闭包。
2. We have just defined four important sets in terms of the transitive closure of four very simple relations.
   我们根据四个非常简单的关系的传递闭包，恰好完成了四个重要的集合。