论文部分内容阅读
例1设集合I=｛1,2,3,4,5｝.选择I的两个非空子集A和B,要使B中最小的数大于A中最大的数,则不同的选择方法共有
Example 1 Let the set I = {1, 2, 3, 4, 5}. Select two non-empty subsets A and B of I so that the smallest number in B is greater than the largest number in A, then the different selection methods are common