2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95738Inspired by the homological mirror symmetry conjecture of Kontsevich, we construct new classes of automorphisms of the bounded derived category of coherent sheaves on a smooth Calabi-Yau variety.LaTeX, 27 pages, no figures; substantially revised; the erroneous lemma 2.6 has been removed; to appear in the Duke Mathematical JournalAlgebraic GeometryHigh Energy Physics - Theory14J32; 18E30text