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arXiv 0904.3672math.AGmath.NT
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$K_2$的同分上同调与Beilinson的Tate猜想

Syntomic cohomology and Beilinson's Tate conjecture for $K_2$

Masanori Asakura, Kanetomo Sato

摘要:

本文研究椭圆曲面上分裂乘法纤维的补U的$K_2$的Tate猜想的一个类似.主要结果是给出了标准上同调$H^2(\bar{U},Q_p(2))$的Galois不动部分的秩的一个上界。作为应用,我们给出了p-adic域上的椭圆K3曲面$X$,其中0-圈的Chow群$CH_0(X)$的挠部分是有限的.这将是第一个例子的表面$X$在一个p-adic域的几何亏格是非零的,其中的扭转部分$CH_0(X)$是有限的。

英文摘要:

In this paper, we study an analogue of the Tate conjecture for $K_2$ of U, the complement of split multiplicative fibers in an elliptic surface. A main result is to give an upper bound of the rank of the Galois fixed part of the etale cohomology $H^2(\bar{U},Q_p(2))$. As an application, we give an elliptic K3 surface $X$ over a p-adic field for which the torsion part of the Chow group $CH_0(X)$ of 0-cycles is finite. This would be the first example of a surface $X$ over a p-adic field whose geometric genus is non-zero and for which the torsion part of $CH_0(X)$ is finite.

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