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arXiv 1504.03047math.NT
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阿贝尔曲面在远离2

Abelian surfaces good away from 2

Christopher Rasmussen, Akio Tamagawa

摘要:

固定一个数字字段$k$和一个有理数素数$\ell$。我们考虑阿贝尔簇,其$\ell$ -幂挠生成$k(μ_{\ell^\infty})$的一个pro-$\ell$扩张,它是从$\ell$非分歧的.这是一个必要的,但通常不是充分的条件,这些品种有好约化远离$\ell$。在$\ell = 2$的特殊情况下,我们证明了阿贝尔表面$A/\mathbb{Q}$,好约化远离$\ell$是足够的。结果推广到椭圆曲线和阿贝尔曲面上的某些号码字段unramified远离$\{2,\infty\}$。一个明确的例子来证明,好约化是不够的,在$\ell = 2$,阿贝尔簇足够高的维度。

英文摘要:

Fix a number field $k$ and a rational prime $\ell$. We consider abelian varieties whose $\ell$-power torsion generates a pro-$\ell$ extension of $k(μ_{\ell^\infty})$ which is unramified away from $\ell$. It is a necessary, but not generally sufficient, condition that such varieties have good reduction away from $\ell$. In the special case of $\ell = 2$, we demonstrate that for abelian surfaces $A/\mathbb{Q}$, good reduction away from $\ell$ does suffice. The result is extended to elliptic curves and abelian surfaces over certain number fields unramified away from $\{2,\infty\}$. An explicit example is constructed to demonstrate that good reduction is not sufficient, at $\ell = 2$, for abelian varieties of sufficiently high dimension.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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