<script asyncsrc='//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js'></script> <script> (adsbygoogle = window.adsbygoogle || []).push({ google_ad_client: "ca-pub-6880849056957494", enable_page_level_ads: true }); </script> <script asyncsrc='//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js'></script> <script> (adsbygoogle = window.adsbygoogle || []).push({ google_ad_client: "ca-pub-6880849056957494", enable_page_level_ads: true }); </script> Généralités sur les groupes et théoréme de Lagrange