wikipedia's (ascii) math notation? emacs easy-way to translate it?

[David Combs]

I see this stuff in math articles in wikipedia -- uses some kind
of ascii math-notation.  What is it?  

(What is math-ML?  Is that it?)

Anyway, sure looks not fun to enter it by hand -- is there an
emacs .el-file that makes it all simple?

Likewise, no fun trying to *read* the stuff.  Emacs have a way
to make it look pretty?

Heck, and a way to produce .ps or .pdf from it?


(Thus far Google has found me nothing on this subject,
at least not via emacs.)


Thanks!


David