Hilbert schemes of fat r-planes and triviality of Chow groups of complete intersections

Details Hilbert schemes of fat r-planes and triviality of Chow groups of complete intersections Hilbert schemes of fat r-planes and triviality of Chow groups of complete intersections

2009-03-29

arxiv.org/abs/0903.5018v2

Mathematics

Algebraic Geometry

The Introduction is substantially revised, to emphasize and explain the new methods. The remaining sections remain unchanged

Scientific paper

In this paper, we investigate the question of triviality of the rational Chow groups of complete intersections in projective spaces and obtain improved bounds for this triviality to hold. Along the way, we study the dimension and nonemptiness of some Hilbert schemes of fat $r$-planes contained in a complete intersection $Y$, generalizing well-known results on the Fano varieties of $r$-planes contained in $Y$.

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