2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64981We prove that if a mapping F:X to Y, where X and Y are Banach spaces, is metrically regular at x for y and its inverse F^{-1} is convex and closed valued locally around (x,y), then for any function G:X to Y with lip G(x)regF(x|y)) < 1, the mapping (F+G)^{-1} has a continuous local selection around (x, y+G(x)) which is also calm.Optimization and ControlClassical Analysis and ODEs49J53, 47H04, 54C60text