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math.RT2018
Cokernels of the Cartan Matrix and Stratifying Systems
Eduardo Marcos, Octavio Mendoza, Corina Sáenz
We study the cokernel of the application given by the Cartan Matrix of a finite dimensional -algebra This produces a finitely generated abelian group, the Cartan grou…
math.RT2018
Pullback diagrams, syzygy finite classes and Igusa-Todorov algebras
Diego Bravo, Marcelo Lanzilotta, Octavio Mendoza
For an abelian category , we define the category PEx() of pullback diagrams of short exact sequences in , as a subcategory of the functor cat…