English

Smoothing pairs over degenerate Calabi-Yau varieties

Algebraic Geometry 2022-02-23 v2

Abstract

We apply the techniques developed in our previous work with Leung to study smoothings of a pair (X,C)(X,\mathfrak{C}^*), where C\mathfrak{C}^* is a bounded perfect complex of locally free sheaves over a degenerate Calabi-Yau variety XX. In particular, if XX is a projective Calabi-Yau variety admitting the structure of a toroidal crossing space and with the higher tangent sheaf TX1\mathcal{T}^1_X globally generated, and F\mathfrak{F} is a locally free sheaf over XX, then we prove, using the recent results of Felten-Filip-Ruddat, that the pair (X,F)(X,\mathfrak{F}) is formally smoothable when Ext2(F,F)0=0\text{Ext}^2(\mathfrak{F},\mathfrak{F})_0 = 0 and H2(X,OX)=0H^2(X,\mathcal{O}_X) = 0.

Keywords

Cite

@article{arxiv.1910.08256,
  title  = {Smoothing pairs over degenerate Calabi-Yau varieties},
  author = {Kwokwai Chan and Ziming Nikolas Ma},
  journal= {arXiv preprint arXiv:1910.08256},
  year   = {2022}
}

Comments

23 pages; v2: final version to appear in IMRN