2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65305The existence of singular solutions of the incompressible Navier-Stokes system with singular external forces, the existence of regular solutions for more regular forces as well as the asymptotic stability of small solutions (including stationary ones), and a pointwise loss of smoothness for solutions are proved in the same function space of pseudomeasure type.Analysis of PDEs35Q30; 76D05; 35B40text