English

Lattices of t-structures and thick subcategories for discrete cluster categories

Representation Theory 2022-12-29 v2 Category Theory

Abstract

We classify t-structures and thick subcategories in discrete cluster categories C(Z)\mathcal{C}(\mathcal{Z}) of Dynkin type AA, and show that the set of all t-structures on C(Z)\mathcal{C}(\mathcal{Z}) is a lattice under inclusion of aisles, with meet given by their intersection. We show that both the lattice of t-structures on C(Z)\mathcal{C}(\mathcal{Z}) obtained in this way and the lattice of thick subcategories of C(Z)\mathcal{C}(\mathcal{Z}) are intimately related to the lattice of non-crossing partitions of type AA. In particular, the lattice of equivalence classes of non-degenerate t-structures on such a category is isomorphic to the lattice of non-crossing partitions of a finite linearly ordered set.

Keywords

Cite

@article{arxiv.2110.08606,
  title  = {Lattices of t-structures and thick subcategories for discrete cluster categories},
  author = {Sira Gratz and Alexandra Zvonareva},
  journal= {arXiv preprint arXiv:2110.08606},
  year   = {2022}
}

Comments

21 pages, comments welcome