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The Relationship between Conductor and Discriminant of an Elliptic Curve Over Q

机译:Q上椭圆曲线的判别与导体之间的关系

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Saito (1988) establishes a relationship between two invariants associated with a smooth projective curve, the conductor and discriminant. Saito defined the conductor of an arbitrary scheme of finite type using p-adic etale cohomology. He used a definition of Deligne for the discriminant as measuring defects in a canonical isomorphism between powers of relative dualizing sheaf of smooth projective curves. The researcher in this paper uses the fact that this relationship is analogous to that of conductor to discriminant in the case of elliptic curves, Saito’s result, as well as analysis of data on conductors and discriminants to determine whether patterns exist between discriminant and conductor of elliptic curves. The researcher finds such patterns do in fact exist and discusses two main patterns: that of the conductor dividing the discriminant and that of the conductor "branching" in a predictable way. These patterns also allow for easier algorithms for computing conductors.
机译:Saito(1988)建立了两个与光滑投影曲线相关的不变量之间的关系,即导体和判别式。 Saito使用p-adic etale谐函数定义了一个有限类型任意方案的导体。他对判别式使用了Deligne的定义,即测量平滑投影曲线的相对二重化分量的幂之间的典型同构的缺陷。本文的研究人员利用这样的事实:在椭圆曲线的情况下,这种关系类似于导体与判别式的关系,Saito的结果,以及对导体和判别式数据的分析,以确定在椭圆形判别式和导体之间是否存在模式曲线。研究人员发现这样的模式实际上确实存在,并讨论了两种主要模式:导体以可区分方式划分判别式和导体“分支”式。这些模式还允许使用更简单的算法来计算导体。

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