2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108804Mixed boundary value problems for the Navier-Stokes system in a polyhedral domain are considered. Different boundary conditions (in particular, Dirichlet, Neumann, slip conditions) are prescribed on the faces of a polyhedron. The authors obtain regularity results for weak solutions in weighted (and non-weighted) L_p Sobolev and Hölder spaces.30 pages, 3 figuresMathematical PhysicsAnalysis of PDEs35J25, 35J55, 35Q30text