On Riedtmann’s well-behaved functors and applications to composites of irreducible morphisms
Abstract
Abstract In this survey, we summarize some results in the literature involving the mesh category, which is a combinatorial representation of the category of modules over a finite-dimensional associative algebra. We discuss Riedtmann’s well-behaved functors, which compare the mesh category with the module category, and discuss how the properties of these functors can be applied to study the problem of composing irreducible morphisms, which is the problem of deciding when the composition of n irreducible morphisms is non-zero and lies on the ( $$n+1$$ n + 1 )-th power of the radical.
Fields of Study & Subjects
Commutative Algebra and Its Applications
Rings
Modules
and Algebras
Algebraic structures and combinatorial models
Publication details
- Journal / source
- São Paulo Journal of Mathematical Sciences
- Publisher
- Springer Science and Business Media LLC
- Volume
- 20
- Issue
- 2
- Publication date
- 28 July 2026
- Language
- EN