# Math Help - isomorphism theorems

1. ## isomorphism theorems

Show that $
\mathbb{Z}_n \backslash \mathbb{Z}_m \cong \mathbb{Z}_{n\backslash m}
$

Im trying to show it using the first isomorphism theorem , but i have trouble with constructing the function (maybe i didnt understand that well the theorem D: )

thanks!

2. nevermind I found the function :P