2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/165856This is a continuation of our previous paper studying the structure of Cartan subalgebras of von Neumann factors of type II_1. We provide more examples of II_1 factors having either zero, one or several Cartan subalgebras. We also prove a rigidity result for some group measure space II_1 factors.24 pages, continuation of arXiv:0706.3623Operator Algebras46L10; 37A20On a class of II_1 factors with at most one Cartan subalgebra IItext