Enhancement: Theorems, definitions, and numbered equations.

[tOgg1]

For some (many) of the mathematics compendiums, having some more clear markup for theorems, definitions etc. would be great. There are a bunch of ways these could be styled, which definitely justifies a discussion.

Also, having these (along with equations) numbered, and being able to refer to them, is also ideal for a lot of the same class of compendiums.