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arXiv · 2407.15644

Elliptic curves and spin

Peter Koymans·Peter Vang Uttenthal
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Abstract

In the early 2000s, Ramakrishna asked the question: For the elliptic curve $$ E: y^2 = x^3 - x, $$ what is the density of primes $p$ for which the Fourier coefficient $a_p(E)$ is a cube modulo $p$? As a generalization of this question, Weston--Zaurova formulated conjectures concerning the distribution of power residues of degree $m$ of the Fourier coefficients of elliptic curves $E/\mathbb{Q}$ with complex multiplication. In this paper, we prove their conjecture for cubic residues using the analytic theory of spin. Our proof works for all elliptic curves $E$ with complex multiplication.

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Peter Koymans, Peter Vang Uttenthal. 2024-07-22. Elliptic curves and spin. https://doi.org/10.1017/s0305004125000428

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