Math Rigor Math Online Tom Circle Rigorous proof (O-level Math but Modern Math technique) by reductio ad absurdum (反证法). 【一道题检验你是否具有数学思维(视频版) – 今日头条】 https://m.toutiao.com/is/e4QeQFQ/ View original postShare this:TwitterFacebookMoreLinkedInRedditTumblrPinterestPocketEmailPrintLike this:Like Loading... Related Author: tomcircle Math amateur View all posts by tomcircle