划分 1.(分成部分) divide; partition; repartition 划分势力范围 carve out spheres of influence; 划分行政区域 divide a country into administrative areas2.(区别) differentiate 划分敌友 differentiate between the enemy and the friend
分数 1.[数学] fraction; fractional number 带分数 mixed number; 繁分数 complex fraction; 假分数 improper fraction; 真分数 proper fraction2.(表示成绩等的数字) mark; grade; point 他在考试中得到好分数。 he attained a good mark in the examination. 他的三角学分数很低。 he received a low mark for trigonometry. 他的学期论文得了个不及格分数。 he received a falling grade on the term paper
According to the partition of set and the definition of covering , this article which takes advantages of the admissible and repelling law and the set theories indicates the relationship of partition and equality , special - covering and admission and the accounting formula of partition numerals and special - covering numerals 本文根据集合的划分与覆盖的定义,利用容斥定理和集合理论,给出了有限集合上的划分与等价关系、完全覆盖与相容关系的关系,以及有限集合上的划分数和完全覆盖数的计算公式。