What is the easiest way to get autocompletion for math symbols when I write latex formulas between
\[...\] in org-mode?
You could use
LaTeX-math-mode from the AucTex package. This provides quick completion of common math macros like
\Sigma etc. Make sure the package is loaded with the following line in your
And then from your org-mode buffer turn on
M-x latex-math-mode. This provides shortcuts for a number of math symbols. You start by entering the backtick symbol "`". The next key will add a LaTeX macro. For example,
\inf, etc. The full list is available on the auctex reference card, and you can add your own shortcuts by customizing the variable
Entering two backticks in a row inserts a plain backtick. You can change the prefix key if you don't want to use the backtick - see the customization option
If you have more complex completion needs, you can use company-mode, yasnippet etc. I don't think there is anything special about configuring these for use with org-mode, relative to any other Emacs mode.