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arXiv 1107.2600math.AG
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广义Hodge和Bloch定理对于一般完全交是等价的

The generalized Hodge and Bloch conjectures are equivalent for general complete intersections

Claire Voisin

摘要:

设$X$是具有平凡Chow群的光滑复射影簇. (By平凡,我们的意思是循环类是单射的。)证明了(假设Lefschetz标准猜想)如果$X$中的丰富超曲面的一般完全交$Y$的零上同调具有几何凸$\geq c$,则$Y$的维数为$\leq c-1$的Chow圈群是平凡的.对$Y$的广义Bloch猜想是这样的陈述,其中“几何coniveau”被“Hodge coniveau”代替。

英文摘要:

Let $X$ be a smooth complex projective variety with trivial Chow groups. (By trivial, we mean that the cycle class is injective.) We show (assuming the Lefschetz standard conjecture) that if the vanishing cohomology of a general complete intersection $Y$ of ample hypersurfaces in $X$ has geometric coniveau $\geq c$, then the Chow groups of cycles of dimension $\leq c-1$ of $Y$ are trivial. The generalized Bloch conjecture for $Y$ is this statement with "geometric coniveau" replaced by "Hodge coniveau".

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