Stratifying systems via a nested family of torsion pairs
Edson Ribeiro Alvares, Matheus Vinicius dos Santos · Revista Matemática Iberoamericana · 2026
In this paper, we introduce the notion of a nested family of torsion pairs. We show that every stratifying system induces a nested family of torsion pairs and, conversely, that such a family together with a suitable object gives rise to a stratifying system; in particular, every stratifying system arises in this way. As an application, we present a stratifying system of infinite size that cannot be indexed by (\mathbb{N}, \leq) , where \leq is the natural order.