2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/167398We give a counting formula for the twisted Fourier-Mukai partners of a projective K3 surface. As an application, we describe all twisted Fourier-Mukai partners of a projective K3 surface of Picard number 1.18 pages. I corrected a mistakeAlgebraic Geometry14J28text