摘要: Proofs are very powerful and are in some ways like computer programs. Indeed, there is a deep historic link between these two concepts that we will touch upon in this course — the invention of computers is intimately tied to the exploration of the idea of a mathematical proof about a century ago. 阅读全文
posted @ 2025-10-07 20:21 Zeeh-Lin 阅读(5) 评论(0) 推荐(0)
摘要: 有趣的命题 在note1中,提出了两个关于“至少”和“至多”的命题: There are at least three distinct integers x that satisfy P(x). 有 最多 三个不同的整数x这满足p(x)。 对于这两个命题,可以分别用下面两个式子表达: $ \exi 阅读全文
posted @ 2025-10-07 20:04 Zeeh-Lin 阅读(36) 评论(0) 推荐(0)