2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114075We prove for a wide class of saturated weakly branch group (including the (first) Grigorchuk group and the Gupta-Sidki group) that the Reidemeister number of any automorphism is infinite.May be problems with PDF caused by pictures. Better to use PSGroup TheoryRepresentation Theory20E45; 37C25; 47H10; 03D40; 20F65; 20F10text