English

$p$-twisted Selmer near-companion curves

Number Theory 2025-08-01 v2

Abstract

Let E1E_1 and E2E_2 be elliptic curves over a number field KK. In \cite{scc}, Mazur and Rubin define the concept of nn-Selmer near-companions and conjecture that if E1E_1 and E2E_2 are nn-Selmer near-companions over KK, then E1[n]E_1[n] is GKG_K-isomorphic to E2[n]E_2[n]. Yu proves the conjecture on nn-Selmer near-companion curves in the case n=2n=2. We we introduce the notion of pp-twisted Selmer near-companions (pp-TSNC) over KK and prove that if E1E_1 and E2E_2 are pp-TSNC over KK, then K(E1[p])=K(E2[p])K(E_1[p])=K(E_2[p]) under certain conditions.

Keywords

Cite

@article{arxiv.2504.10896,
  title  = {$p$-twisted Selmer near-companion curves},
  author = {Minseok Kim},
  journal= {arXiv preprint arXiv:2504.10896},
  year   = {2025}
}

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