[AUCTeX] Adding curly braces in math mode

[Jens Kubieziel]

Hi,

when typing sub- or superscripts in math mode I often need curly braces.
So I want to customize AUCTeX that everytime when I press `_' or `^' it
automagically appends `{}' and places the cursor inside. I guess this
can be done like described in 'Style Files' in auctex.info. But actually
I'm not sure how to do it in detail (without any lisp knowledge).

Furthermore I'm looking for a way to expand math operators with indices
to its last values.
Example: I typed $\sum_{i=1}^n ...$. Later I type `$\sum_' and now I want
AUCTeX to print `\sum_{i=1}^n '. How can this be done?

Thanks for any pointers.

-- 
Jens Kubieziel                                   http://www.kubieziel.de
FdI#345: EDV-Beauftagter
Ehrenamt für den, »der Ahnung von Computer hat«. (Dieter Funck)