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math.CT2012
On universal gradings, versal gradings and Schurian generated categories
Claude Cibils, Maria Julia Redondo, Andrea Solotar
Categories over a field can be graded by different groups in a connected way; we consider morphisms between these gradings in order to define the fundamental grading group. We…
math.RT2012★ 4 cited
On the first Hochschild cohomology group of a cluster-tilted algebra
Ibrahim Assem, Maria Redondo, Ralf Schiffler
Given a cluster-tilted algebra B, we study its first Hochschild cohomology group HH^1(B) with coefficients in the B-B-bimodule B. If C is a tilted algebra such that B is the relati…