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arxiv: 1211.5833 · v2 · pith:KS2Q6A4Gnew · submitted 2012-11-26 · 🧮 math.AG · math.NT

On p-torsion of p-adic elliptic curves with additive reduction

classification 🧮 math.AG math.NT
keywords p-adicreductionadditiveellipticp-torsionconditionscontaincurve
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Let E be an elliptic curve with additive reduction over the p-adic numbers, and let G be the group of p-adic points on E that have good reduction. This paper gives necessary and sufficient conditions for G to contain non-trivial p-torsion.

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  1. Nontrivial torsion in the Tate--Shafarevich group of elliptic curves via visibility and twists

    math.NT 2026-02 unverdicted novelty 5.0

    Visibility theorems imply nontrivial ℓ-torsion in Sha of quadratic twists of elliptic curves with additive reduction at ℓ; for ℓ=3 this yields pairs of curves with identical BSD data and Kodaira symbols but isomorphic...