摘要: 这个在Cryptography里有用,因为对于大的数找起来很难 Legendre's three square theorem: a positive integer can be expressed as a sum of 4 squares if and only if it is not of 阅读全文
posted @ 2023-01-29 09:23 Corylus 阅读(29) 评论(0) 推荐(0) 编辑