Remarks on the Lefschetz standard conjecture and hyperkähler varieties
Remarks on the Lefschetz standard conjecture and hyperkähler varieties
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DOI:
10.4171/cmh/291
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发表时间:
2010
影响因子:
0.9
通讯作者:
Franccois Charles
中科院分区:
文献类型:
--
作者:
Franccois Charles
We study the Lefschetz standard conjecture on a smooth complex projective variety X. In degree 2, we reduce it to a local statement concerning local deformations of vector bundles on X. When X is hyperkahler, we show that the existence of nontrivial deformations of stable hyperholomorphic bundles implies the Lefschetz standard conjecture in codimension 2.