2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55584We show that discrete torsion is implemented in a D-brane world-volume theory by using a projective representation of the orbifold point group. We study the example of C^3/Z_2 x Z_2 and show that the resolution of singularities agrees with that proposed by Vafa and Witten. A new type of fractional brane appears.10 pp., harvmacHigh Energy Physics - Theorytext