%0 Journal Article
%A Marché, Julien
%A Wolff, Maxime
%T The parallelogram identity on groups and deformations of the trivial character in $\protect \mathrm{SL}_2(\protect \mathbb{C})$
%J Journal de l’École polytechnique — Mathématiques
%D 2020
%P 263-285
%V 7
%I Ecole polytechnique
%U http://www.numdam.org/articles/10.5802/jep.117/
%R 10.5802/jep.117
%G en
%F JEP_2020__7__263_0