The Néron component series of an abelian variety

The Néron component series of an abelian variety
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阿贝尔品种的 Néron 组件系列

DOI:
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发表时间:
2009
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通讯作者:
J. Nicaise
J. Nicaise
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作者:
L. H. Halle;J. Nicaise

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我们引入了完备离散值域上交换簇A的Néron分支列。这是$${mathbb{Z}}左[左[T]中的幂级数 [8] 8]$$,它衡量的行为的Néron模型的组件的数量下驯服分歧的基本领域。如果A是tamely分歧的,那么我们证明了Néron分量级数是有理的。它在T = 1处有一个极点,其阶数等于1加上A的潜在复曲面秩。这一结果是我们证明的motivic单值猜想的阿贝尔品种的一个重要组成部分。我们希望它扩展到广泛分歧的情况下,我们证明这一点,如果A是一个椭圆曲线,如果A有潜在的纯乘法减少。
We introduce the Néron component series of an abelian variety A over a complete discretely valued field. This is a power series in $${mathbb{Z}}left[left[T ight] ight]$$, which measures the behaviour of the number of components of the Néron model of A under tame ramification of the base field. If A is tamely ramified, then we prove that the Néron component series is rational. It has a pole at T = 1, whose order equals one plus the potential toric rank of A. This result is a crucial ingredient of our proof of the motivic monodromy conjecture for abelian varieties. We expect that it extends to the wildly ramified case; we prove this if A is an elliptic curve, and if A has potential purely multiplicative reduction.