2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68986In this paper we study vector fields on the big phase space of Gromov-Witten theory which are idempotents of the quantum product. Such vector fields can be used to simplify universal equations for higher genus Gromov-Witten invariants.27 pages, LaTex format, minor changeDifferential GeometryMathematical PhysicsAlgebraic Geometrytext