[Tex/LaTex] Transitioning to mathtools – environment proof undefined


I am new to LaTeX and I was using the amsthm package in order to write proofs by using the proof environment:



Stuff in here
Proof in here


I then decided to use the mathtools package, since it contains more symbols and corrects some of the amsthm's bugs. However, if I substitute the line




I get the error "! LaTeX Error: Environment proof undefined."

Is there a way to correct this?
Thanks for helping!

Best Answer

amsthm and mathtools are unrelated. mathtools updates and extends amsmath.

you still need amsthm if you want the proof environment.