Infinite family of rank ≥ 7
Problèmes ouverts — A. Dujella · 2026 · ★★★★★
Statement
Problem 2.7 (Dujella, 2026). Is there an infinite family of elliptic curves, parametrized by rational points of a genus 1 curve, with torsion group $\mathbb{Z}/4\mathbb{Z}$ and rank $\geqslant 7$?
Remark. There is an elliptic curve over $\mathbb{Q}(t)$ with torsion group $\mathbb{Z}/4\mathbb{Z}$ and rank 6 (see Dujella, A., Peral, J.C.: An elliptic curve over $\mathbb{Q}(u)$ with torsion $\mathbb{Z}/4\mathbb{Z}$ and rank 6. Rad Hrvat. Akad. Znan. Umjet. Mat. Znan. 28, 185–192 (2024)).
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Source & credits
Origin : Andrej Dujella, Open problems on Diophantine m-tuples and elliptic curves (26 juillet 2026), Problème 2.7
Reproduit à des fins pédagogiques non commerciales, avec attribution à l'auteur. Problème de recherche ouvert : aucune solution connue à ce jour.
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