2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/181947We analyze the level-rank duality of omega_c-twisted D-branes of SU(N)_K (when N and K>2). When N or K is even, the duality map involves Z_2-cominimal equivalence classes of twisted D-branes. We prove the duality of the spectrum of an open string stretched between omega_c-twisted D-branes, and ascertain the relation between the charges of level-rank-dual omega_c-twisted D-branes.24 pages. v2: reference addedHigh Energy Physics - Theorytext