Functorially finite hearts, simple-minded systems in negative cluster categories, and noncrossing partitions

Coelho Guardado Simoes, Raquel and Pauksztello, David and Ploog, David and Zvonareva, Alexandra (2022) Functorially finite hearts, simple-minded systems in negative cluster categories, and noncrossing partitions. Compositio Mathematica, 158 (1). pp. 211-243. ISSN 0010-437X

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Abstract

Let Q be an acyclic quiver and w⩾1 be an integer. Let C−w(kQ) be the (−w)-cluster category of kQ. We show that there is a bijection between simple-minded collections in Db(kQ) lying in a fundamental domain of C−w(kQ) and w-simple-minded systems in C−w(kQ). This generalises the same result of Iyama–Jin in the case that Q is Dynkin. A key step in our proof is the observation that the heart H of a bounded t-structure in a Hom-finite, Krull–Schmidt, k-linear saturated triangulated category D is functorially finite in D if and only if H has enough injectives and enough projectives. We then establish a bijection between w-simple-minded systems in C−w(kQ) and positive w-noncrossing partitions of the corresponding Weyl group WQ.

Item Type:
Journal Article
Journal or Publication Title:
Compositio Mathematica
Additional Information:
http://journals.cambridge.org/action/displayJournal?jid=UHY The final, definitive version of this article has been published in the Journal, Compositio Mathematica, 158 (1), pp 211-243 2022, © 2022 Cambridge University Press.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2600/2602
Subjects:
ID Code:
160933
Deposited By:
Deposited On:
13 Oct 2021 12:30
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Aug 2022 00:46