Weber modular curves and modular isogenies

Fuente: arXiv
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Main Authors: Colò, Leonardo, Kohel, David
Format: Preprint
Published: 2026
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author Colò, Leonardo
Kohel, David
author_facet Colò, Leonardo
Kohel, David
contents We study the modular curves defined by Weber functions, and associated modular polynomials, action of $\mathrm{SL}_2(\mathbb{Z})$, and parametrizations of elliptic curves with a view to the study of the isogeny graphs that they determine, particularly for supersingular elliptic curves. In addition to applications to efficient isogeny computation in cryptographic applications, we present an application to explicit Galois representations.
format Preprint
id arxiv_https___arxiv_org_abs_2603_29802
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Weber modular curves and modular isogenies
Colò, Leonardo
Kohel, David
Number Theory
We study the modular curves defined by Weber functions, and associated modular polynomials, action of $\mathrm{SL}_2(\mathbb{Z})$, and parametrizations of elliptic curves with a view to the study of the isogeny graphs that they determine, particularly for supersingular elliptic curves. In addition to applications to efficient isogeny computation in cryptographic applications, we present an application to explicit Galois representations.
title Weber modular curves and modular isogenies
topic Number Theory
url https://arxiv.org/abs/2603.29802