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Infinitely many elliptic curves over $\mathbb{Q}(i)$ with rank 2 and $j$-invariant 1728

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arxiv 2506.17605 v2 pith:7YMDW7G3 submitted 2025-06-21 math.NT

classification math.NT
keywords curvesinfinitelymanymathbbrankellipticinvariantbase
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We prove that there exist infinitely many elliptic curves over $\mathbb{Q}(i)$ with $j$-invariant $1728$ and rank exactly $2$ which are not obtained by base change from $\mathbb{Q}$. The rank of each such curve is determined via 2-isogeny descent, and the existence of infinitely many such curves follows from Tao's constellation theorem for Gaussian primes.

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  1. Infinitely many hyperelliptic curves of small genus and small fixed rank, and of any genus and rank two

    math.NT 2025-05 unverdicted novelty 6.0 of 10

    For any number field K and genus g ≥ 2, there are infinitely many non-isomorphic hyperelliptic curves over K with Jacobian rank 0, 1, or 2 over K; explicit higher-rank ranges are given for small genera over Q.

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