2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/150053Take a bounded symmetric domain $D$ and an arithmetic subgroup $Γ$ of ${\rm Aut}(D)$. Take the quotient $D/Γ$, compactify and resolve the singularities. We study the fundamental group of the compact complex manifolds that result from this procedure, and in particular the case of Siegel modular threefolds.Plain TeXAlgebraic Geometrytext