English

Wonderful resolutions and categorical crepant resolutions of singularities

Algebraic Geometry 2013-09-04 v2 Category Theory

Abstract

Let XX be an algebraic variety with Gorenstein singularities. We define the notion of a wonderful resolution of singularities of XX by analogy with the theory of wonderful compactifications of semi-simple linear algebraic groups. We prove that if XX has rational singularities and has a wonderful resolution of singularities, then XX admits a categorical crepant resolution of singularities. As an immediate corollary, we get that all determinantal varieties defined by the minors of a generic square/symmetric/skew-symmetric matrix admit categorical crepant resolution of singularities. We also discuss notions of minimality for a categorical resolution of singularities and we explore some links between minimality and crepancy for such resolutions.

Keywords

Cite

@article{arxiv.1209.1564,
  title  = {Wonderful resolutions and categorical crepant resolutions of singularities},
  author = {Roland Abuaf},
  journal= {arXiv preprint arXiv:1209.1564},
  year   = {2013}
}

Comments

38 pages. Some modifications in the presentation