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We present a new quadratic Chabauty method to compute the integral points on certain even degree hyperelliptic curves. Our approach relies on a nontrivial degree zero divisor supported at the two points at infinity to restrict the $p$-adic…

Number Theory · Mathematics 2025-12-01 Stevan Gajović , J. Steffen Müller

We determine the quadratic Chabauty set for integral points on elliptic curves of rank $2$ defined over imaginary quadratic fields using quadratic Chabauty. This builds on the work of Bianchi and Balakrishnan et al. We give the first…

Number Theory · Mathematics 2024-09-06 Aashraya Jha

The Chabauty--Kim method was developed with the aim of approaching effective Faltings', the problem of explicitly determining the finite set of rational points on a hyperbolic curve. This method has seen success with the more particular…

Number Theory · Mathematics 2026-04-15 David Corwin , Ishai Dan-Cohen

The Chabauty--Coleman--Kim method, under favourable circumstances, describes the set of integral points of a hyperelliptic curve inside the $p$-adic zeroes of certain transcendental functions. For an elliptic curve of Mordell--Weil rank…

Number Theory · Mathematics 2026-04-23 Jennifer S. Balakrishnan , Francesca Bianchi , Netan Dogra

We generalize the explicit quadratic Chabauty techniques for integral points on odd degree hyperelliptic curves and for rational points on genus 2 bielliptic curves to arbitrary number fields using restriction of scalars. This is achieved…

Number Theory · Mathematics 2020-06-16 Jennifer S. Balakrishnan , Amnon Besser , Francesca Bianchi , J. Steffen Müller

We give the first explicit examples beyond the Chabauty-Coleman method where Kim's nonabelian Chabauty program determines the set of rational points of a curve defined over $\mathbb{Q}$ or a quadratic number field. We accomplish this by…

Number Theory · Mathematics 2018-11-14 Jennifer S. Balakrishnan , Netan Dogra

Quadratic Chabauty is a $p$-adic method for determining rational points on curves. Local heights are arithmetic invariants used in the quadratic Chabauty method. We present an algorithm to compute these local heights for hyperelliptic…

Number Theory · Mathematics 2025-05-22 L. Alexander Betts , Juanita Duque-Rosero , Sachi Hashimoto , Pim Spelier

We give a method for the computation of integral points on a hyperelliptic curve of odd degree over the rationals whose genus equals the Mordell-Weil rank of its Jacobian. Our approach consists of a combination of the $p$-adic approximation…

Number Theory · Mathematics 2015-11-11 Jennifer S. Balakrishnan , Amnon Besser , J. Steffen Müller

Conditionally on the Tate--Shafarevich and Bloch--Kato Conjectures, we give an explicit upper bound on the size of the $p$-adic Chabauty--Kim locus, and hence on the number of rational points, of a smooth projective curve $X/\mathbb{Q}$ of…

Number Theory · Mathematics 2023-10-10 L. Alexander Betts , David Corwin , Marius Leonhardt

The Chabauty--Kim method and its refined variant by Betts and Dogra aim to cut out the $S$-integral points $X(\mathbb{Z}_S)$ on a curve inside the $p$-adic points $X(\mathbb{Z}_p)$ by producing enough Coleman functions vanishing on them. We…

Number Theory · Mathematics 2025-02-18 Martin Lüdtke

The Chabauty--Kim method is a method for finding rational points on curves under certain technical conditions, generalising Chabauty's proof of the Mordell conjecture for curves with Mordell--Weil rank less than their genus. We show how the…

Number Theory · Mathematics 2019-05-15 Jennifer Balakrishnan , Netan Dogra

We give sufficient conditions for finiteness of linear and quadratic refined Chabauty-Kim loci of affine hyperbolic curves. We achieve this by constructing depth $\leq 2$ quotients of the fundamental group, following a construction of…

Number Theory · Mathematics 2024-10-08 Marius Leonhardt , Martin Lüdtke , J. Steffen Müller

The Chabauty--Kim method is a tool for finding the integral or rational points on varieties over number fields via certain transcendental $p$-adic analytic functions arising from certain Selmer schemes associated to the unipotent…

Number Theory · Mathematics 2021-12-01 Netan Dogra

Let $X$ be a curve of genus $g>1$ over $\mathbb{Q}$ whose Jacobian $J$ has Mordell--Weil rank $r$ and N\'eron--Severi rank $\rho$. When $r < g+ \rho - 1$, the geometric quadratic Chabauty method determines a finite set of $p$-adic points…

Number Theory · Mathematics 2024-03-07 Juanita Duque-Rosero , Sachi Hashimoto , Pim Spelier

In this paper we prove the finiteness of the set of S-integral points of a punctured rational elliptic curve without complex multiplication using the Chabauty-Kim method. This extends previous results of Kim in the complex multiplication…

Number Theory · Mathematics 2020-06-09 Federico Amadio Guidi

We extend the explicit quadratic Chabauty methods developed in previous work by the first two authors to the case of non-hyperelliptic curves. This results in an algorithm to compute the rational points on a curve of genus $g \ge 2$ over…

Number Theory · Mathematics 2017-11-17 Jennifer S. Balakrishnan , Netan Dogra , J. Steffen Müller , Jan Tuitman , Jan Vonk

Determining all rational points on a curve of genus at least 2 can be difficult. Chabauty's method (1941) is to intersect, for a prime number p, in the p-adic Lie group of p-adic points of the jacobian, the closure of the Mordell-Weil group…

Algebraic Geometry · Mathematics 2023-06-07 Bas Edixhoven , Guido Lido

We present results of quadratic Chabauty experiments on genus 2 bielliptic modular curves of Jacobian rank 2 that have recently been added to the LMFDB. We apply quadratic Chabauty methods over both the rationals and quadratic imaginary…

Number Theory · Mathematics 2025-09-29 Kate Finnerty

We give a formula for the component at p of the p-adic height pairing of a divisor of degree 0 on a hyperelliptic curve. We use this to give a Chabauty-like method for finding p-adic approximations to p-integral points on such curves when…

Number Theory · Mathematics 2014-12-31 Jennifer S. Balakrishnan , Amnon Besser , J. Steffen Müller

We develop an effective version of the Chabauty--Kim method which gives explicit upper bounds on the number of $S$-integral points on a hyperbolic curve in terms of dimensions of certain Bloch--Kato Selmer groups. Using this, we give a new…

Number Theory · Mathematics 2021-06-03 L. Alexander Betts
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