2021年3月4日
康托展开
摘要： Cantor Expansion: \(X = \sum_{i=1}^n (n-i)!\sum_{j=i+1}^{n}[p_i>p_j]\) It is a bijection from a permutation of \(p[1..n]\) to its dictionary order. We 阅读全文
posted @ 2021-03-04 17:55 _dwt 阅读(14) 评论(0) 推荐(0)