English

Large tilting sheaves over weighted noncommutative regular projective curves

Algebraic Geometry 2017-02-09 v3 Representation Theory

Abstract

Let X\mathbb{X} be a weighted noncommutative regular projective curve over a field kk. The category QcohX\operatorname{Qcoh}\mathbb{X} of quasicoherent sheaves is a hereditary, locally noetherian Grothendieck category. We classify all tilting sheaves which have a non-coherent torsion subsheaf. In case of nonnegative orbifold Euler characteristic we classify all large (that is, non-coherent) tilting sheaves and the corresponding resolving classes. In particular we show that in the elliptic and in the tubular cases every large tilting sheaf has a well-defined slope.

Keywords

Cite

@article{arxiv.1508.03833,
  title  = {Large tilting sheaves over weighted noncommutative regular projective curves},
  author = {Lidia Angeleri Hügel and Dirk Kussin},
  journal= {arXiv preprint arXiv:1508.03833},
  year   = {2017}
}

Comments

52 pages, 1 figure. v2: revised Cor. 6.6 and 7.15; a few minor fixes. v3: revised proof of Prop. 5.7; a few minor fixes and improvements

R2 v1 2026-06-22T10:34:42.946Z