closed under union
英 [kləʊzd ˈʌndə(r) ˈjuːniən]
美 [kloʊzd ˈʌndər ˈjuːniən]
网络 封闭
双语例句
- Words language generated by CFLG is closed under union and concatenation.
上下文无关格值文法生成的词语言关于并与连接运算封闭。 - In a lattice the definition of metajoin-ideal has been introduced, and the family of all metajoin-ideals is closed under arbitrary intersection as well as arbitrary union.
并引进了亚并理想的概念，且给出了格中亚并理想的任意交、任意并的封闭性。