复射影流形上的挠上同调类与代数闭链
代数几何
2007-05-23 v2
摘要
Atiyah与Hirzebruch给出了光滑复射影流形的奇异上同调中偶次挠类的例子,它们不与代数闭链Poincaré对偶。我们注意到这些类的阶相对于流形的维数而言较小。然而,基于Kollár的一个构造,人们可以给出具有任意高素数阶的此类例子,而维数固定。该方法也提供了挠代数闭链的例子,它们在Griffiths群中非平凡,并且位于Chow群上的H.Saito滤子的任意高层次中。
引用
@article{arxiv.math/0403254,
title = {Torsion cohomology classes and algebraic cycles on complex projective manifolds},
author = {C. Soule and C. Voisin},
journal= {arXiv preprint arXiv:math/0403254},
year = {2007}
}
备注
Final version, to appear in Adv. in Mathematics, special issue dedicated to M. Artin. References to related work by C. Schoen added. A mistake mentioned by K. O'Grady corrected