Since 2017, the Reactor and Applied Mathematics Research Department (SERMA) of CEA/Paris-Saclay has been organizing the annual workshop “Mathematics 4 Neutronics", as part of the CNRS Réseau Thématique "Terre et Énergies" (formerly MaNu - Mathematics for Nuclear Energy - Research Group), and under the auspices of the Programme d'initiative Emilie du Châtelet (P2I, Graduate School de Physique, Université Paris-Saclay).