2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/62288We give an overview over several constructions of TQFT's over finite fields and cyclotomic integers and their applications to characterizing 3-manifolds and their fundamental groups.Slides of talk presented at the RIMS workshop "Invariants of knots and 3-manifolds". 20 pages, 8 figuresGeometric TopologyQuantum Algebratext