13楼: Originally posted by hank612 at 2016-05-30 13:11:20
实在不想辛辛苦苦打了半天的字，却变成 ”Invalid Equation“

\prod_{n=0}^{\infty}(1+\frac{x}{4n+1})\cdot(1-\frac{x}{4n+3})

=\prod_{n=0}^{\infty}\frac{1-(\frac{(x-1)/4}{(n+1/2)})^2}{1-(\frac{1/4} ...

2楼: Originally posted by 001gqs at 2016-05-06 20:15:40
除了复变里面的Weierstrass factorization Thm, 我别无他法。