Moduli of reflexive sheaves on smooth projective 3-folds

[摘要] We compute the expected dimension of the moduli space of torsion-free rank 2 sheaves at a point corresponding to a stable reflexive sheaf, and give conditions for the existence of a perfect tangent-obstruction complex on a class of smooth projective threefolds; this class includes Fano and Calabi-Yau threefolds. We also explore both local and global relationships between moduli spaces of reflexive rank 2 sheaves and the Hilbert scheme of curves. (c) 2007 Elsevier B.V. All rights reserved.

[发布日期] 2007-12-01