English

Gale duality and the linearisation map for noncommutative crepant resolutions

Algebraic Geometry 2021-09-21 v1

Abstract

We describe in geometric terms the map that is Gale dual to the linearisation map for quiver moduli spaces associated to noncommutative crepant resolutions in dimension three. This allows us to formulate Reid's recipe in this context in terms of a pair of integer-valued matrices, one of which appears to satisfy an attractive sign-coherence property. We provide some new evidence for a conjecture, known to hold in the toric case, which implies that a minimal generating set of relations between the determinants of the tautological bundles encodes the supports of the images of the vertex simples under the derived equivalence, and vice-versa.

Keywords

Cite

@article{arxiv.2109.09565,
  title  = {Gale duality and the linearisation map for noncommutative crepant resolutions},
  author = {Alastair Craw},
  journal= {arXiv preprint arXiv:2109.09565},
  year   = {2021}
}

Comments

23 pages

R2 v1 2026-06-24T06:08:35.145Z