2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75313Using the degeneration formula for Doanldson-Thomas invariants, we proved formulae for blowing up a point and simple flops.Latex, 15 pagesAlgebraic GeometryMathematical PhysicsPrimary: 14D20; Secondary: 14J30The Donaldson-Thomas invariants under blowups and flopstext