@[Chouquet](/user/207812) 方程有整数解且 $AB<0$ ?
by WanderingTrader @ 2021-04-12 22:40:47
@[Chouquet](/user/207812)
$$
\gcd(a,b)|c \quad and \quad ab<0
$$
by Curators @ 2021-04-12 23:27:39