2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152264We discuss Witten's formulas for the symplectic volumes of moduli spaces of flat connections on 2-manifolds from the viewpoint of Hamiltonian cobordism as introduced by Ginzburg-Guillemin-Karshon.20 pages, AMS-LaTeX, amssymb,eepic,epicDifferential GeometryModuli spaces of flat connections on 2-manifolds, cobordism, and Witten's volume formulastext