Torsion cohomology classes and algebraic cycles on complex projective manifolds
Abstract
Atiyah and Hirzebruch gave examples ofeven degree torsion classes in the singularcohomology of a smooth complex projective manifold, which arenot Poincar\'{e} dual to an algebraiccycle. We notice that the order ofthese classes are small comparedto the dimension of the manifold.However, building upon a construction ofKoll\`{a}r, one can provide such examples witharbitrary high prime order, the dimension being fixed. This method alsoprovides examples of torsion algebraiccycles, which are non trivial in the Griffiths' groups, and lie in a arbitrary high level of the H.Saito filtration onChow groups.
Keywords
Cite
@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}
}
Comments
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