The convexity number con (D) of a nontrivial connected oriented graph D is the maximum cardinality of a proper convex set of D.是什么意思_The convexity number con (D) of a nontrivial connected oriented graph D is the maximum cardinality of a proper convex set of D.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句