{"title":"给出伽罗瓦点的光滑超曲面的线性自同构","authors":"Taro Hayashi","doi":"10.4134/BKMS.B200428","DOIUrl":null,"url":null,"abstract":"Let $X$ be a smooth hypersurface $X$ of degree $d\\geq4$ in a projective space $\\mathbb P^{n+1}$. We consider a projection of $X$ from $p\\in\\mathbb P^{n+1}$ to a plane $H\\cong\\mathbb P^n$. This projection induces an extension of function fields $\\mathbb C(X)/\\mathbb C(\\mathbb P^n)$. The point $p$ is called a Galois point if the extension is Galois. In this paper, we will give a necessary and sufficient conditions for $X$ to have Galois points by using linear automorphisms.","PeriodicalId":278201,"journal":{"name":"arXiv: Algebraic Geometry","volume":"5 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Linear automorphisms of smooth hypersurfaces giving Galois points\",\"authors\":\"Taro Hayashi\",\"doi\":\"10.4134/BKMS.B200428\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Let $X$ be a smooth hypersurface $X$ of degree $d\\\\geq4$ in a projective space $\\\\mathbb P^{n+1}$. We consider a projection of $X$ from $p\\\\in\\\\mathbb P^{n+1}$ to a plane $H\\\\cong\\\\mathbb P^n$. This projection induces an extension of function fields $\\\\mathbb C(X)/\\\\mathbb C(\\\\mathbb P^n)$. The point $p$ is called a Galois point if the extension is Galois. In this paper, we will give a necessary and sufficient conditions for $X$ to have Galois points by using linear automorphisms.\",\"PeriodicalId\":278201,\"journal\":{\"name\":\"arXiv: Algebraic Geometry\",\"volume\":\"5 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-01-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv: Algebraic Geometry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4134/BKMS.B200428\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv: Algebraic Geometry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4134/BKMS.B200428","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Linear automorphisms of smooth hypersurfaces giving Galois points
Let $X$ be a smooth hypersurface $X$ of degree $d\geq4$ in a projective space $\mathbb P^{n+1}$. We consider a projection of $X$ from $p\in\mathbb P^{n+1}$ to a plane $H\cong\mathbb P^n$. This projection induces an extension of function fields $\mathbb C(X)/\mathbb C(\mathbb P^n)$. The point $p$ is called a Galois point if the extension is Galois. In this paper, we will give a necessary and sufficient conditions for $X$ to have Galois points by using linear automorphisms.