The Néron component series of an abelian variety
The Néron component series of an abelian variety
复制标题
阿贝尔品种的 Néron 组件系列
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
J. Nicaise
中科院分区:
文献类型:
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作者:
L. H. Halle;J. Nicaise
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.