General ⇒ Changing the default theorem styles

[LuckyDucky]

I would like to change the theorem styles so that they end with a colon instead of a period. I want it to apply to all theorems, corollaries, remarks, proofs, definitions, etc.

How do I do so?

[Stefan Kottwitz]

You could use a flexible package like amsthm or ntheorem.

Stefan

[LuckyDucky]

I'm using amsthm and I figured out how to change the theorems but now I need to change the proof styles and there is no /newproofstyle command...