English

A $p$-Converse theorem for Real Quadratic Fields

Number Theory 2025-05-19 v2

Abstract

Let EE be an elliptic curve defined over a real quadratic field FF. Let p>5p > 5 be a rational prime that is inert in FF and assume that EE has split multiplicative reduction at the prime p\mathfrak{p} of FF dividing pp. Let III(E/F)\underline{III}(E/F) denote the Tate-Shafarevich group of EE over FF and L(E/F,s) L(E/F,s) be the Hasse-Weil complex LL-function of EE over FF. Under some technical assumptions, we show that when rankZE(F)=1rank_{\mathbb{Z}} \hspace{0.01mm} \hspace{1mm} E(F) = 1 and #(III(E/F)p)<\#\Big(\underline{III}(E/F)_ {p^\infty}\Big) < \infty, then ords=1 L(E/F,s)=1ord_{s=1} \ L(E/F,s) = 1. Further, we give an applictaion to a pp-converse theorem over Q\mathbb{Q}.

Keywords

Cite

@article{arxiv.2504.21799,
  title  = {A $p$-Converse theorem for Real Quadratic Fields},
  author = {Muskan Bansal and Somnath Jha and Aprameyo Pal and Guhan Venkat},
  journal= {arXiv preprint arXiv:2504.21799},
  year   = {2025}
}

Comments

28 pages, application to $\mathbb{Q}$ added

R2 v1 2026-06-28T23:17:04.071Z