Chow groups of K3 surfaces and spherical objects
Daniel Huybrechts
Universität Bonn, Germany
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Abstract
We show that for a K3 surface the finitely generated subring introduced by Beauville and Voisin is preserved under derived equivalences. This is proved by analyzing Chern characters of spherical bundles (and complexes). As for a K3 surface defined over a number field all spherical bundles on the complex K3 surface are defined over , this is compatible with the Bloch–Beilinson conjecture. Besides the work of Beauville and Voisin [5], Lazarfeld’s result on Brill–Noether theory for curves in K3 surfaces [15] and the deformation theory developed in [12] are central for the discussion.
Cite this article
Daniel Huybrechts, Chow groups of K3 surfaces and spherical objects. J. Eur. Math. Soc. 12 (2010), no. 6, pp. 1533–1551
DOI 10.4171/JEMS/240