{"title":"关于椭圆曲线上扭转的概率局部全局原理","authors":"J. Cullinan, Meagan Kenney, J. Voight","doi":"10.5802/jtnb.1193","DOIUrl":null,"url":null,"abstract":"Let $m$ be a positive integer and let $E$ be an elliptic curve over $\\mathbb{Q}$ with the property that $m\\mid\\#E(\\mathbb{F}_p)$ for a density $1$ set of primes $p$. Building upon work of Katz and Harron-Snowden, we study the probability that $m$ divides the the order of the torsion subgroup of $E(\\mathbb{Q})$: we find it is nonzero for all $m \\in \\{ 1, 2, \\dots, 10, 12, 16\\}$ and we compute it exactly when $m \\in \\{ 1,2,3,4,5,7 \\}$. As a supplement, we give an asymptotic count of elliptic curves with extra level structure when the parametrizing modular curve is torsion free of genus zero.","PeriodicalId":0,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"On a probabilistic local-global principle for torsion on elliptic curves\",\"authors\":\"J. Cullinan, Meagan Kenney, J. Voight\",\"doi\":\"10.5802/jtnb.1193\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Let $m$ be a positive integer and let $E$ be an elliptic curve over $\\\\mathbb{Q}$ with the property that $m\\\\mid\\\\#E(\\\\mathbb{F}_p)$ for a density $1$ set of primes $p$. Building upon work of Katz and Harron-Snowden, we study the probability that $m$ divides the the order of the torsion subgroup of $E(\\\\mathbb{Q})$: we find it is nonzero for all $m \\\\in \\\\{ 1, 2, \\\\dots, 10, 12, 16\\\\}$ and we compute it exactly when $m \\\\in \\\\{ 1,2,3,4,5,7 \\\\}$. As a supplement, we give an asymptotic count of elliptic curves with extra level structure when the parametrizing modular curve is torsion free of genus zero.\",\"PeriodicalId\":0,\"journal\":{\"name\":\"\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0,\"publicationDate\":\"2020-05-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://doi.org/10.5802/jtnb.1193\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.5802/jtnb.1193","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
On a probabilistic local-global principle for torsion on elliptic curves
Let $m$ be a positive integer and let $E$ be an elliptic curve over $\mathbb{Q}$ with the property that $m\mid\#E(\mathbb{F}_p)$ for a density $1$ set of primes $p$. Building upon work of Katz and Harron-Snowden, we study the probability that $m$ divides the the order of the torsion subgroup of $E(\mathbb{Q})$: we find it is nonzero for all $m \in \{ 1, 2, \dots, 10, 12, 16\}$ and we compute it exactly when $m \in \{ 1,2,3,4,5,7 \}$. As a supplement, we give an asymptotic count of elliptic curves with extra level structure when the parametrizing modular curve is torsion free of genus zero.