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arXiv 0811.3109math.NTmath.AG
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椭圆曲面的特殊化和Mordell-Weil群中的整除性

Specializations of elliptic surfaces, and divisibility in the Mordell-Weil group

Patrick Ingram

摘要:

令$E$是定义在数域$k$上的曲线$C$上的椭圆曲面,令$P$是$E$的一部分,令$\ell$是有理数素数。对于任意非奇异纤维$E_t$,我们将$E_t$上的点$Q$的代数次数限定为至多$D$ over $k$,使得对于某些$n\geq 1$,有$\ell^n Q=P_t$.所得到的界仅取决于$\ell$、所讨论的表面和截面、$D$和度$[k(t):k]$ ;也就是说,它在所有有界度的纤维上是均匀的。在特殊情况下,我们得到更具体的,在某些情况下尖锐,界限。

英文摘要:

Let $E$ be an elliptic surface over the curve $C$, defined over a number field $k$, let $P$ be a section of $E$, and let $\ell$ be a rational prime. For any non-singular fibre $E_t$, we bound the number of points $Q$ on $E_t$ of (algebraic) degree at most $D$ over $k$, such that $\ell^n Q=P_t$, for some $n\geq 1$. The bound obtained depends only on $\ell$, the surface and section in question, $D$, and the degree $[k(t):k]$; that is, it is uniform across all fibres of bounded degree. In special cases, we obtain more specific, in some instances sharp, bounds.

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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