A torsion Z/22 curve over a quartic field
Problèmes ouverts — A. Dujella · 2026 · ★★★★★
Statement
Problem 2.9 (Dujella, 2026). Is there an elliptic curve over a quartic field with torsion group $\mathbb{Z}/22\mathbb{Z}$ and positive rank?
Remark. Solved by Maksym Voznyy on 2024/01/04. There is a curve with torsion group $\mathbb{Z}/22\mathbb{Z}$ and rank 2 over the quartic field defined by the polynomial $f(x) = x^4 + \frac{50}{27}x^3 + \frac{281}{243}x^2 + \frac{68}{243}x + \frac{2}{81}$. The curve has the equation \[ y^2 - (201204z^3+328374z^2+159732z+8019)xy - (14996874942306z^3+23680026731268z^2+10746821159640z+931263196176)y \] \[ {}= x^3 - (1435244994z^3+2266248132z^2+1028502360z+89124624)x^2, \] where $z$ is a root of $f$.
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Source & credits
Origin : Andrej Dujella, Open problems on Diophantine m-tuples and elliptic curves (26 juillet 2026), Problème 2.9
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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