English

Tilting on non-commutative rational projective curves

Algebraic Geometry 2012-01-24 v5 Representation Theory

Abstract

In this article we introduce a new class of non-commutative projective curves and show that in certain cases the derived category of coherent sheaves on them has a tilting complex. In particular, we prove that the right bounded derived category of coherent sheaves on a reduced rational projective curve with only nodes and cusps as singularities, can be fully faithfully embedded into the right bounded derived category of the finite dimensional representations of a certain finite dimensional algebra of global dimension two. As an application of our approach we show the dimension of the bounded derived category of coherent sheaves on a rational projective curve with only nodal or cuspidal singularities is at most two. In the case of the Kodaira cycles of projective lines, the corresponding tilted algebras belong to a well-known class of gentle algebras. We work out in details the tilting equivalence in the case of the plane nodal cubic.

Keywords

Cite

@article{arxiv.0905.1231,
  title  = {Tilting on non-commutative rational projective curves},
  author = {Igor Burban and Yuriy Drozd},
  journal= {arXiv preprint arXiv:0905.1231},
  year   = {2012}
}

Comments

40 pages; misprints fixed in the new version

R2 v1 2026-06-21T12:59:39.114Z