A Note on Commuting Reflection Functors for Calabi-Yau d-folds
Algebraic Geometry
2012-06-27 v1 Category Theory
Abstract
We study sets of commuting reflection functors in the derived category of sheaves on Calabi-Yau varieties. We show that such a collection is determined by a set of mutually orthogonal spherical objects. We also show that when the spherical objects are locally-free sheaves then the kernel of the composite transform parametrizes properly torsion-free with zero-dimensional singularity sets and conversely that such a kernel gives rise to a collection of mutually orthogonal spherical vector bundles. We do this using a more detailed analysis of the reason why spherical twists give equivalences.
Cite
@article{arxiv.1206.6019,
title = {A Note on Commuting Reflection Functors for Calabi-Yau d-folds},
author = {Antony Maciocia},
journal= {arXiv preprint arXiv:1206.6019},
year = {2012}
}