The Motive of the Hilbert Cube X [ 3 ]
نویسنده
چکیده
The Hilbert scheme X [3] of length-3 subschemes of a smooth projective variety X is known to be smooth and projective. We investigate whether the property of having a multiplicative Chow– Künneth decomposition is stable under taking the Hilbert cube. This is achieved by considering an explicit resolution of the rational map X 3 99K X [3]. The case of the Hilbert square was taken care of in Shen and Vial [Mem. Amer. Math. Soc. 240(1139) (2016), vii+163 pp]. The archetypical examples of varieties endowed with a multiplicative Chow–Künneth decomposition is given by abelian varieties. Recent work seems to suggest that hyperKähler varieties share the same property. Roughly, if a smooth projective variety X has a multiplicative Chow–Künneth decomposition, then the Chow rings of its powers X n have a filtration, which is the expected Bloch–Beilinson filtration, that is split. 2010 Mathematics Subject Classification: 14C05 (primary); 14C25, 14C15 (secondary)
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