Month: June 2021

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/

He applied Physics (flux ) Gauss Divergence Theorem ‘DIV’ operator to get the derivative of Volume = Surface Area “

👍 That’s beautifully an example of using Physics to prove Math.

https://en.m.wikipedia.org/wiki/Divergence_theorem