中文

椭圆曲线上线性级列的拐点除子

代数几何 2020-08-11 v3

摘要

在这篇以阐述为主的短文中,我们描述了一类椭圆曲线上的除子,它们通过沿标准2对1投影的拉回,从P1\mathbb{P}^1上的线丛(作为全纯截面的子空间)出发,对线性级列的拐点进行索引。与椭圆曲线Eλ:y2=x(x1)(xλ)E_{\lambda}: y^2= x(x-1)(x-\lambda)上的每个拐点除子相关联的,是在以xxλ\lambda为坐标的仿射平面(的射影紧化)中的一条相应的{\it 拐点曲线}。这些拐点曲线具有显著特征;除其他外,只要Legendre参数λ\lambda为实数,它们便直接导向关于EλE_{\lambda}上线性级列的{\it 实}拐点个数的显式猜想。

关键词

引用

@article{arxiv.1903.03222,
  title  = {Inflection divisors of linear series on an elliptic curve},
  author = {Ethan Cotterill and Cristhian Garay López},
  journal= {arXiv preprint arXiv:1903.03222},
  year   = {2020}
}

备注

A separability conjecture for inflection polynomials associated with maximally-real elliptic curves was stated correctly in the first version but not in the second; so we reverted to the first version. Additional small additions/fixes; to appear in the proceedings of the ICM satellite conf in Campinas