2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81989The application of renormalization group methods to microscopic nuclear many-body calculations is discussed. We present the solution of the renormalization group equations in the particle-hole channels for neutron matter and the application to S-wave pairing. Furthermore, we point out that the inclusion of tensor and spin-orbit forces leads to spin non-conserving effective interactions in nuclear matter.6 pages, 3 figures, Invited talk at Hirschegg 2003, Nuclear Structure and Dynamics at the LimitsNuclear Theorytext