apply TeX-to-char-paragraph-or-region to an article

[Uwe Brauer <oub@mat.ucm.es>]

Hello

In GNU Emacs and Xemacs it is possible to set the input
method to TeX, that is: 
when typing \int ∫
appears.

Now in Xemacs there exists a function, written by Aidan
Kohoe, which replaces in a region or paragraph already
written TeX constructs by its symbols (the inverse function
exists as well.)

I use this function very often when I write email with math
but I would find it extremely helpful to apply the function
also to emails which I received by others (article)

For example the function gnus-article-fill-cited-article runs
on an article. How could I write a function based on 
TeX-to-char-paragraph-or-region
which does what I want.

Thanks


Uwe Brauer