2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51849The paper is withdrawn by the author. Parts of the contents are expanded into separate papers; hep-th/0308015 LOCALIZED TACHYON MASS AND A G-THEOREM ANALOGUE, hep-th/0308028 COMMENTS ON THE FATE OF UNSTABLE ORBIFOLDS, hep-th/0308029 CHIRAL RINGS AND GSO PROJECTION IN ORBIFOLDS.withdrawn by the authorHigh Energy Physics - Theorytext