English

The Coherent-Constructible Correspondence for Toric Deligne-Mumford Stacks

Algebraic Geometry 2014-04-08 v2 Combinatorics

Abstract

We extend our previous work arXiv:1007.0053 on coherent-constructible correspondence for toric varieties to include toric Deligne-Mumford (DM) stacks. Following Borisov-Chen-Smith, a toric DM stack \cX\bSi\cX_\bSi is described by a "stacky fan" \bSi=(N,\Si,β)\bSi=(N,\Si,\beta), where NN is a finitely generated abelian group and \Si\Si is a simplicial fan in N\bR=N\bZ\bRN_\bR=N\otimes_{\bZ}\bR. From \bSi\bSi we define a conical Lagrangian Λ\bSi\Lambda_\bSi inside the cotangent TM\bRT^*M_\bR of the dual vector space M\bRM_\bR of N\bRN_\bR, such that torus-equivariant, coherent sheaves on \cX\bSi\cX_\bSi are equivalent to constructible sheaves on M\bRM_\bR with singular support in \LbS\LbS.

Keywords

Cite

@article{arxiv.0911.4711,
  title  = {The Coherent-Constructible Correspondence for Toric Deligne-Mumford Stacks},
  author = {Bohan Fang and Chiu-Chu Melissa Liu and David Treumann and Eric Zaslow},
  journal= {arXiv preprint arXiv:0911.4711},
  year   = {2014}
}

Comments

30 pages, 2 figures