2011/10/31 by Alex Dugas · 25 citations
Mathematics · Physics and Astronomy · #Advanced Topics in Algebra #Algebraic structures and combinatorial models #Class (philosophy) #Combinatorics #Endomorphism #Equivalence (formal languages) #Graph #Injective function #Mathematics #Mutation #Nonlinear Waves and Solitons #Pure mathematics #Quiver #Sequence (biology) #Simple (philosophy) #Simple module #Vertex (graph theory) #math.RT #msc:16E35 #msc:16G10 #msc:18E30
paper · pdf · doi:10.1007/s10468-013-9422-2
published in Algebras and Representation Theory 17(3), 863-884 (Springer Science+Business Media) · Description and proof of mutated algebra made more rigorous (Prop. 3.1 and 4.2). Okuyama's Lemma incorporated: Theorem 4.1 is now Corollary 5.1, and proof is omitted. To appear in Algebras and Representation Theory
openalex publication_date 2013/05/15 · arxiv created 2013/09/16 · arxiv updated 2016/06/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider tilting mutations of a weakly symmetric algebra at a subset of simple modules, as recently introduced by T. Aihara. These mutations are defined as the endomorphism rings of certain tilting complexes of length 1. Starting from a weakly symmetric algebra A, presented by a quiver with relations, we give a detailed description of the quiver and relations of the algebra obtained by mutating at a single loopless vertex of the quiver of A. In this form the mutation procedure appears similar to, although significantly more complicated than, the mutation procedure of Derksen, Weyman and Zelevinsky for quivers with potentials. By definition, weakly symmetric algebras connected by a sequence of tilting mutations are derived equivalent, and hence stably equivalent. The second aim of this article is to study these stable equivalences via a result of Okuyama describing the images of the simple modules. As an application we answer a question of Asashiba on the derived Picard groups of a class of self-injective algebras of finite representation type. We conclude by introducing a mutation procedure for maximal systems of orthogonal bricks in a triangulated category, which is motivated by the effect that a tilting mutation has on the set of simple modules in the stable category.