dorsal/arxiv
View SchemaTwo infinite families of elliptic curves with Mordell-Weil rank at least $3$
| Authors | Pankaj Patel, Debopam Chakraborty, Jaitra Chattopadhyay |
|---|---|
| Categories | |
| ArXiv ID | 2601.08570vv1 |
| URL | https://arxiv.org/abs/2601.08570 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
In this paper, we consider two infinite parametric families of elliptic curves defined over $\mathbb{Q}$ given by the equations $E_{a,b} : y^{2} = x^{3} - a^{2}x + b^{2}$ and $E^{\prime}_{a,b} : y^{2} = x^{3} - a^{2}x + b^{6}$, where $a,b \in \mathbb{N}$ satisfy certain mild conditions. We prove that the torsion group of $E_{a,b}(\mathbb{Q})$ is trivial and the Mordell-Weil ranks of both $E_{a,b}(\mathbb{Q})$ and $E^{\prime}_{a,b}(\mathbb{Q})$ are at least $3$ for infinitely many choices of $a$ and $b$ by using the N\'{e}ron-Tate height of a rational point and by exploiting the unit group of the ring of integers of $\mathbb{Q}(\sqrt{3})$. This is an extension of the results of Brown-Myres and Fujita-Nara where lower bounds of the ranks were provided under the assumption that $a = 1$ or $b = 1$. Also, our families of elliptic curves vastly generalize the curves recently investigated by Hatley and Stack.
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"abstract": "In this paper, we consider two infinite parametric families of elliptic curves defined over $\\mathbb{Q}$ given by the equations $E_{a,b} : y^{2} = x^{3} - a^{2}x + b^{2}$ and $E^{\\prime}_{a,b} : y^{2} = x^{3} - a^{2}x + b^{6}$, where $a,b \\in \\mathbb{N}$ satisfy certain mild conditions. We prove that the torsion group of $E_{a,b}(\\mathbb{Q})$ is trivial and the Mordell-Weil ranks of both $E_{a,b}(\\mathbb{Q})$ and $E^{\\prime}_{a,b}(\\mathbb{Q})$ are at least $3$ for infinitely many choices of $a$ and $b$ by using the N\\\u0027{e}ron-Tate height of a rational point and by exploiting the unit group of the ring of integers of $\\mathbb{Q}(\\sqrt{3})$. This is an extension of the results of Brown-Myres and Fujita-Nara where lower bounds of the ranks were provided under the assumption that $a = 1$ or $b = 1$. Also, our families of elliptic curves vastly generalize the curves recently investigated by Hatley and Stack.",
"arxiv_id": "2601.08570",
"authors": [
"Pankaj Patel",
"Debopam Chakraborty",
"Jaitra Chattopadhyay"
],
"categories": [
"math.NT"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Two infinite families of elliptic curves with Mordell-Weil rank at least $3$",
"url": "https://arxiv.org/abs/2601.08570",
"version": "v1"
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