环面曲面奇点一阶形变上的对偶化层
代数几何
2016-10-10 v2
摘要
我们明确描述了满足Wahl、Koll\'ar-Shepherd-Barron和Viehweg引入的形变条件之一的循环商奇点的无穷小形变。结论是,在许多情况下这三种概念彼此不同。特别地,我们看到尽管一般类型曲面的模空间的KSB和Viehweg版本具有相同的底层约化子概型,但它们的无穷小结构是不同的。
引用
@article{arxiv.1601.07805,
title = {The dualizing sheaf on first-order deformations of toric surface singularities},
author = {Klaus Altmann and János Kollár},
journal= {arXiv preprint arXiv:1601.07805},
year = {2016}
}
备注
The introduction has been expanded. Moreover, we have corrected a couple of misprints and a mistake in the quotation of the T1 formula