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arXiv 0709.0663math.AGmath.NT
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K3曲面、有理曲线和有理点

K3 surfaces, rational curves, and rational points

Arthur Baragar, David McKinnon

摘要:

证明了对于数域$k$上定义的任意一类椭圆曲面$X$,如果$X$上存在一个代数点只位于任意多条有理曲线上,则$X$上存在一个代数点不位于任何有理曲线上.特别是,我们的定理适用于一个大类的椭圆$K3$表面,这涉及到一个问题所提出的Bogomolov在1981年。我们应用我们的结果来构建一个明确的代数点上的$K3$表面不在于任何光滑的有理曲线。

英文摘要:

We prove that for any of a wide class of elliptic surfaces $X$ defined over a number field $k$, if there is an algebraic point on $X$ that lies on only finitely many rational curves, then there is an algebraic point on $X$ that lies on no rational curves. In particular, our theorem applies to a large class of elliptic $K3$ surfaces, which relates to a question posed by Bogomolov in 1981. We apply our results to construct an explicit algebraic point on a $K3$ surface that does not lie on any smooth rational curves.

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