TY - JOUR TI - Dossier Sommaire JO - Comptes Rendus. Mathématique PY - 2019 SP - v EP - vi VL - 357 IS - 1 PB - Elsevier UR - http://archive.numdam.org/articles/10.1016/S1631-073X(18)30313-3/ DO - 10.1016/S1631-073X(18)30313-3 LA - fr ID - CRMATH_2019__357_1_R5_0 ER -