On a remark by Y. Namikawa
Algebraic Geometry
2014-08-29 v4
Abstract
The aim of the present paper is on the one hand to produce examples supporting the conclusion of Y. Namikawa in Remark 2.8 of \cite{N} and improving considerations of Example 1.11 of the same paper. On the other hand, it is intended to give a geometric interpretation of the rigidity properties of some trees of exceptional rational curves, as observed by Namikawa, which can be obtained by factorizing small resolutions through nodal threefolds.
Cite
@article{arxiv.0807.4104,
title = {On a remark by Y. Namikawa},
author = {Michele Rossi},
journal= {arXiv preprint arXiv:0807.4104},
year = {2014}
}
Comments
This paper has been withdrawn because it has been superseded by arXiv:1203.1500 and the just submitted paper "Deforming Namikawa's fiber products", arXiv:1211.6329