Milnor纤维签名不是半连续的
代数几何
2010-10-21 v3
摘要
考虑中孤立曲面奇点的芽。相应的Milnor纤维具有同调格(具有自然对称交形式的积分中同调)。A.Durfee (1978)的一个老问题问:在退化下,这个形式的签名是否非增?本文给出了否定回答:我们给出了牛顿非退化族的例子,其中签名在退化下增加。
引用
@article{arxiv.0907.5252,
title = {The Milnor fibre signature is not semi-continuous},
author = {Dmitry Kerner and Andras Nemethi},
journal= {arXiv preprint arXiv:0907.5252},
year = {2010}
}
备注
Final version, to appear in "Contemporary Mathematics" volume (proceedings of Li60ber). 5 pages, uses curves.sty. A reference added. One typo corrected