摘要：
𝑥𝑛−1=(𝑥−1)(𝑥𝑛−1+𝑥𝑛−2+…+𝑥+1) https://math.stackexchange.com/questions/900869/prove-xn-1-x-1xn-1xn-2-x1 等比 在复数域上， ,其中 是单位根。 在实数域上， 若 为奇数， , 若 为偶 阅读全文
摘要：
The Frobenius endomorphism (and the maps it induces on cohomology) plays a very important rôle in modern mathematics. Despite this it is rather easily 阅读全文
摘要：
https://artofproblemsolving.com/wiki/ https://artofproblemsolving.com/wiki/index.php/Wilson%27s_Theorem#:~:text=Wilson%27s%20Theorem%20In%20number%20t 阅读全文