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On the Chow groups of certain cubic fourfolds

Research paper by Robert Laterveer

Indexed on: 11 Mar '17Published on: 11 Mar '17Published in: arXiv - Mathematics - Algebraic Geometry



Abstract

This note is about the Chow groups of a certain family of smooth cubic fourfolds. This family is characterized by the property that each cubic fourfold $X$ in the family has an involution such that the induced involution on the Fano variety $F$ of lines in $X$ is symplectic and has a $K3$ surface $S$ in the fixed locus. The main result establishes a relation between $X$ and $S$ on the level of Chow motives. As a consequence, we can prove finite-dimensionality of the motive of certain members of the family.