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arXiv 1105.4568math.AGmath.KT
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K3曲面的凝聚层和基模的导出范畴

Derived categories of coherent sheaves and motives of K3 surfaces

Alessio Del Padrone, Claudio Pedrini

摘要:

设X和Y是光滑复射影簇。Orlov证明,如果X和Y是等价的,那么它们的动机M(X)和M(Y)在Voevodsky的有理系数几何动机的三角范畴中是同构的。在本文中,我们证明了猜想的情况下,X是一个K3曲面允许椭圆纤维化(总是发生的情况下,如果X的皮卡德秩至少是5)有限维Chow动机。我们还将这一结果与Huybrechts的一个猜想表明,对于一个K3曲面与辛对合,其动机的有限维意味着对合作为身份的周群的0-循环。我们给出的例子对K3表面具有相同的有限维动机,但不派生等价。

英文摘要:

Let X and Y be smooth complex projective varieties. Orlov conjectured that if X and Y are derived equivalent then their motives M(X) and M(Y) are isomorphic in Voevodsky's triangulated category of geometrical motives with rational coefficients. In this paper we prove the conjecture in the case X is a K3 surface admitting an elliptic fibration (a case that always occurs if the Picard rank of X is at least 5) with finite-dimensional Chow motive. We also relate this result with a conjecture by Huybrechts showing that, for a K3 surface with a symplectic involution, the finite-dimensionality of its motive implies that the involution acts as the identity on the Chow group of 0-cycles. We give examples of pairs of K3 surfaces with the same finite-dimensional motive but not derived equivalent.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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