Geodesic
Cluster equivalence and graded derived equivalence.
Documenta mathematica, Tome 19 (2014), pp. 1155-1206.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: In this paper we introduce a new approach for organizing algebras of global dimension at most 2. We introduce the notion of cluster equivalence for these algebras, based on whether their generalized cluster categories are equivalent. We are particularly interested in the question how much information about an algebra is preserved in its generalized cluster category, or, in other words, how closely two algebras are related if they have equivalent generalized cluster categories. Our approach makes use of the cluster-tilting objects in the generalized cluster categories: We first observe that cluster-tilting objects in generalized cluster categories are in natural bijection with cluster-tilting subcategories of derived categories, and then prove a recognition theorem for the latter. Using this recognition theorem we give a precise criterion when two cluster equivalent algebras are derived equivalent. For a given algebra we further describe all the derived equivalent algebras which have the same canonical cluster tilting object in their generalized cluster category. Finally we show that in general, if two algebras are cluster equivalent, then (under certain conditions) the algebras can be graded in such a way that the categories of graded modules are derived equivalent. To this end we introduce mutation of graded quivers with potential, and show that this notion reflects mutation in derived categories.
Classification : 16E35, 18E30, 16G20
Keywords: cluster category, cluster tilting, derived equivalence, quiver mutation 
@article{DOCMA_2014__19__a5,
     author = {Amiot, Claire and Oppermann, Steffen},
     title = {Cluster equivalence and graded derived equivalence.},
     journal = {Documenta mathematica},
     pages = {1155--1206},
     publisher = {mathdoc},
     volume = {19},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a5/}
}
TY  - JOUR
AU  - Amiot, Claire
AU  - Oppermann, Steffen
TI  - Cluster equivalence and graded derived equivalence.
JO  - Documenta mathematica
PY  - 2014
SP  - 1155
EP  - 1206
VL  - 19
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a5/
LA  - en
ID  - DOCMA_2014__19__a5
ER  - 
%0 Journal Article
%A Amiot, Claire
%A Oppermann, Steffen
%T Cluster equivalence and graded derived equivalence.
%J Documenta mathematica
%D 2014
%P 1155-1206
%V 19
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a5/
%G en
%F DOCMA_2014__19__a5
Amiot, Claire; Oppermann, Steffen. Cluster equivalence and graded derived equivalence.. Documenta mathematica, Tome 19 (2014), pp. 1155-1206. http://geodesic.mathdoc.fr/item/DOCMA_2014__19__a5/