Math symbols in vim

Does anyone know how to have vim convert the html entities of math symbols into the math characters?

For example:

≠ becomes ≠

∴ becomes ∴

here is a table with the symbol html entities http://barzilai.org/math_sym.htm

using the :digraphs functionality of Vim. with a character encoding of Unicode,

see ':help digraphs' for documentation

I'm Still looking for a monospace Unicode font so it renders completely but with extra spaces it works great.

In order to see math characters UTF-8 has to be the encoding and a font that will display those characters.

I added the following to my vim configuration files.

created custom file: mathdoc.vim in syntax/

" set the encoding to be utf-8, requires gVim or a terminal capable of
" unicode see ':help Unicode' for details
set encoding=utf-8
" requires a font that has characters for the higher uniocode symbols
set guifont=MS\ Gothic

I added this to filetype to set this for my own custom extension .txtmt

au BufNewFile,BufRead *.txtmt   setf mathdoc

but you could alternately call this with the file open:

:set ft=mathdoc

digraphs works great as bignose specified below here is how it works

in insert mode: press control+k followed by:

∴ is S*

≠ is !=

∑ is +Z

≡ is =3

⇐ is <=

⇒ is =>

⇔ is ==

∀ is FA

∃ is TE

∋ is -)

see :digraphs for the complete list * note if you only see half a screens worth you're character encoding is not unicode, unicode characters cover several screens, type :set encoding