@danrobinson TIL that the quite elementary calculus theorem I think we all use a huge amount without even realizing it is also named.... Fermat's theorem
https://en.wikipedia.org/wiki/...
@danrobinson直到我认为我们都使用了大量的微积分定理，甚至没有意识到它也被命名为。。。。费马定理
https://en.wikipedia.org/wiki/...