Let denote the group of homomorphisms between and . Show that .
The only thing I have is that since we're dealing with a homomorphism that divides , but I don't see how that fact gets used to prove the above statement.
Let denote the group of homomorphisms between and . Show that .
The only thing I have is that since we're dealing with a homomorphism that divides , but I don't see how that fact gets used to prove the above statement.