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arXiv 1902.01068math.NT
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关于$p$ -adic李扩张中Mordell-Weil秩的增长性

On the growth of Mordell-Weil ranks in $p$-adic Lie extensions

Pin-Chi Hung, Meng Fai Lim

摘要:

设$p$是一个奇素数,$F_{\infty}$是数域$F$的$p$ -进李扩张.设$A$是$F$上的一个阿贝尔簇,它在$p$以上的每个素数处都有普通约化.在各种假设下,我们建立了$A$的交换簇在$p$ -adic Lie扩张中的Mordell-Weil秩增长的渐近上界.我们的上界可以用来自分圆水平的不变量来表示。受此公式的启发,我们猜想了$p$ -adic Lie扩张上Mordell-Weil秩增长的一个渐近上界,该上界与分圆$\mathbb{Z}_p$ -扩张上交换簇的Mordell-Weil秩有关.最后,很自然地要问,当阿贝尔簇具有非平凡约化时,是否存在这样的几何上界。为此,我们至少可以适当地为在虚二次域的$\mathbb{Z}_p^2$ -扩张上的素数$p$处具有良好超奇约化化的椭圆曲线的Mordell-Weil秩的增长制定一个类似的几何上界。

英文摘要:

Let $p$ be an odd prime and $F_{\infty}$ a $p$-adic Lie extension of a number field $F$. Let $A$ be an abelian variety over $F$ which has ordinary reduction at every primes above $p$. Under various assumptions, we establish asymptotic upper bounds for the growth of Mordell-Weil rank of the abelian variety of $A$ in the said $p$-adic Lie extension. Our upper bound can be expressed in terms of invariants coming from the cyclotomic level. Motivated by this formula, we make a conjecture on an asymptotic upper bound of the growth of Mordell-Weil ranks over a $p$-adic Lie extension which is in terms of the Mordell-Weil rank of the abelian variety over the cyclotomic $\mathbb{Z}_p$-extension. Finally, it is then natural to ask whether there is such a conjectural upper bound when the abelian variety has non-ordinary reduction. For this, we can at least modestly formulate an analogue conjectural upper bound for the growth of Mordell-Weil ranks of an elliptic curve with good supersingular reduction at the prime $p$ over a $\mathbb{Z}_p^2$-extension of an imaginary quadratic field.

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