Sorry, the quotation of the file content beamer-fr.org missed. Here is:
#+TITLE:
#+DATE:
#+OPTIONS: H:2 toc:nil author:t
#+LATEX_CLASS: beamer-ahp-ul
#+LANGUAGE:fr
**
:PROPERTIES:
:BEAMER_opt: allowframebreaks,label=
:END:
bibliography:/home/joseph/MEGA/org/reforg.bib
bibliographystyle:apalik
Hello Johanna,
I am using scimax from John Kitchin [[https://github.com/jkitchin/scimax
]]and I recommend it to you warmly.
In my /user/user.el, here is what is about beamer :
#+BEGIN_SRC lisp
(add-to-list 'org-latex-classes
'("beamer-ahp-ul"
"\\documentclass\[10