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arXiv 1803.04835math.NT
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半阿贝尔曲面中的不可能相交

Unlikely intersections in semi-abelian surfaces

Daniel Bertrand, Harry Schmidt

摘要:

我们考虑一族具有复乘的椭圆曲线的乘性扩张,它依赖于一个参数。它们形成了一个三维簇$G$,其中包含一组稠密的特殊曲线,称为Ribet曲线,它严格包含挠曲线。我们表明,一个不可约曲线$W$在$G$满足这一套Zerkiki密集只有当$W$位于纤维的家庭或翻译的Ribet曲线的乘法部分。当参数空间是泛参数空间时,我们进一步从这个结果推导出了对附在三重$G$上的混合Shimura簇的Zilber-Pink猜想(数域上)的证明.

英文摘要:

We consider a family, depending on a parameter, of multiplicative extensions of an elliptic curve with complex multiplications. They form a 3-dimensional variety $G$ which admits a dense set of special curves, known as Ribet curves, which strictly contains the torsion curves. We show that an irreducible curve $W$ in $G$ meets this set Zariski-densely only if $W$ lies in a fiber of the family or is a translate of a Ribet curve by a multiplicative section. We further deduce from this result a proof of the Zilber-Pink conjecture (over number fields) for the mixed Shimura variety attached to the threefold $G$, when the parameter space is the universal one.

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