Marguerite's theorem, the love of math in a movie

Lʹavenir de Marguerite, brillante élève en mathématiques à lʹEcole Normale Supérieure à Paris, semble tout tracé. The only girl in her class, she is finishing a thesis that she is due to present to an audience of researchers. On the big day, a mistake upsets all her certainties and the whole building collapses. Marguerite decides to leave everything behind and start again