首页> 外文期刊>Izvestiya. Mathematics >On symplectic coverings of the projective plane
【24h】

On symplectic coverings of the projective plane

机译:关于射影平面的辛覆盖

获取原文
获取原文并翻译 | 示例
           

摘要

We prove that a resolution of singularities of any finite covering of the projective complex plane branched along a Hurwitz curve (H) over bar, and possibly along the line "at infinity", can be embedded as a symplectic submanifold in some projective algebraic manifold equipped with an integer Kahler symplectic form. (If (H) over bar has negative nodes, then the covering is assumed to be non-singular over them.) For cyclic coverings, we can realize these embeddings in a rational complex 3-fold. Properties of the Alexander polynomial of (H) over tilde are investigated and applied to the calculation of the first Betti number b(1)((X) over bar (n)), where (X) over bar (n) is a resolution of singularities of an n-sheeted cyclic covering of CP2 branched along (H) over bar, and possibly along the line "at infinity". We prove that b(1) ((X) over bar (n)) is even if (H) over bar is an irreducible Hurwitz curve but, in contrast to the algebraic case, b(1) ((X) over bar (n)) may take any non-negative value in the case when (H) over bar consists of several components.
机译:我们证明,沿着条形上的Hurwitz曲线(H)分支并可能沿着“无穷大”线分支的射影复杂平面的任何有限覆盖的奇点分辨率都可以作为辛子流形嵌入在某些射影代数流形中具有整数Kahler辛格式。 (如果bar上的(H)具有负节点,则假定覆盖在它们上不是奇异的。)对于循环覆盖,我们可以将这些嵌入实现为有理复数3倍。研究(H)在波浪号上的亚历山大多项式的性质,并将其应用于计算第一个Betti数b(1)((X)在第(n)条上),其中在第(n)条上的(X)是分辨率CP的n片状环状覆盖物的奇异点沿着条形上的(H)分支,并且可能沿着“无穷大”线分支。我们证明即使(H)over bar是不可约的Hurwitz曲线,b(1)((X)over bar(n))也是相等的,但是与代数情况相反,b(1)((X)over bar(当(H)over bar由多个部分组成时,n))可以取任何非负值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号