2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108935We construct an invariant of t-structures on the derived category of a Noetherian ring. This invariant is complete when restricting to the category of quasi-coherent complexes, and also gives a classification of nullity classes with the same restriction. On the full derived category of $\mathbb Z$ we show that the class of distinct t-structures do not form a set.Commutative AlgebraAlgebraic Geometry18E30text