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math.GR2022
A countable universal torsion abelian group for purity
Ivo Herzog, Marcos Mazari-Armida
We show that there is a countable universal abelian p-group for purity, i.e., a countable abelian p-group such that every countable abelian p-group purely embeds in . This i…
math.RT2022★ 1 cited
Simples in a cotilting heart
Lidia Angeleri Hügel, Ivo Herzog, Rosanna Laking
Every cotilting module over a ring R induces a t-structure with a Grothendieck heart in the derived category D(Mod R). We determine the simple objects in this heart and their injec…