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Enriques surfaces and Jacobian elliptic K3 surfaces

机译:Enriques曲面和Jacobian椭圆K3曲面

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This paper proposes a new geometric construction of Enriques surfaces. Its starting point are K3 surfaces with Jacobian elliptic fibration which arise from rational elliptic surfaces by a quadratic base change. The Enriques surfaces obtained in this way are characterised by elliptic fibrations with a rational curve as bisection which splits into two sections on the covering K3 surface. The construction has applications to the study of Enriques surfaces with specific automorphisms. It also allows us to answer a question of Beauville about Enriques surfaces whose Brauer groups show an exceptional behaviour. In a forthcoming paper, we will study arithmetic consequences of our construction.
机译:本文提出了一种新的恩里克曲面的几何构造。它的起点是具有雅可比椭圆形纤维化的K3曲面,这些曲面是通过二次基本变化从有理椭圆形曲面产生的。以此方式获得的Enriques表面的特征是,椭圆形纤维具有二等分的有理曲线,在覆盖K3表面上分为两部分。该构造可应用于具有特定自同构性的Enriques曲面的研究。这也使我们能够回答博维尔有关Enriques表面的问题,这些表面的Brauer组表现出非凡的行为。在即将发表的论文中,我们将研究构造的算术结果。

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