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math.RA2026
Trace ideals and uniserial modules
Dolors Herbera, Pavel PÅÃ hoda
The paper studies trace ideals of projective modules over the endomorphism ring of a uniserial module, characterizing when right‑hand trace ideals differ from left‑hand ones and pr…
math.RA2025
A family of examples of generalized perfect rings
Pınar AydoÄdu, Dolors Herbera
We construct a family of semiprimitive and non von Neumann regular rings satisfying that any right or left module is isomorphic to a quotient of its flat cover (in the sense of Eno…
math.RA2025
A poisonous example to explicit resolutions of unbounded complexes
Dolors Herbera, Wolfgang Pitsch, Manuel SaorÃn +1
We show that various methods for explicitly building resolutions of unbounded complexes in fact fail when applied to a rather simple and explicit complex. We show that one way to r…