$p$-adic $L$-functions for elliptic curves over global function fields
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866915853843300352 |
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| author | Tan, Ki-Seng |
| author_facet | Tan, Ki-Seng |
| contents | We introduce a $p$-adic $L$-function $\mathscr L_{A/L}$ associated to an ordinary elliptic curve $A$ over a global function field $K$ of characteristic $p$ together with a $\mathbb{Z}_{p}^{d}$-extension $L/K$, $d=0$ allowed, unramified outside a finite set of places where $A$ has ordinary (good ordinary or multiplicative) reductions. This $\mathscr L_{A/L}$ is characterized by its interpolation of the special values of twisted Hasse-Weil $L$-functions, we show that it satisfies the desired functional equation and specialization formula in connection with the characteristic ideal of the dual $p^\infty$-Selmer group of $A/L$. The Iwasawa main conjecture having $\mathscr{L}_{A / L}$ as the analytic side is proven in several cases. In the $d\geq 3$ case, %and $A/K$ has semi-stable reductions everywhere, the conjecture holds for $A/L$ if and only if it holds for all intermediate $\Z_p^2$-extensions $A/L'$ belonging to a given non-empty Zariski open subset of the Grassmannian $\mathrm{Gr}(d-2,d)(\Z_p)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_10576 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | $p$-adic $L$-functions for elliptic curves over global function fields Tan, Ki-Seng Number Theory We introduce a $p$-adic $L$-function $\mathscr L_{A/L}$ associated to an ordinary elliptic curve $A$ over a global function field $K$ of characteristic $p$ together with a $\mathbb{Z}_{p}^{d}$-extension $L/K$, $d=0$ allowed, unramified outside a finite set of places where $A$ has ordinary (good ordinary or multiplicative) reductions. This $\mathscr L_{A/L}$ is characterized by its interpolation of the special values of twisted Hasse-Weil $L$-functions, we show that it satisfies the desired functional equation and specialization formula in connection with the characteristic ideal of the dual $p^\infty$-Selmer group of $A/L$. The Iwasawa main conjecture having $\mathscr{L}_{A / L}$ as the analytic side is proven in several cases. In the $d\geq 3$ case, %and $A/K$ has semi-stable reductions everywhere, the conjecture holds for $A/L$ if and only if it holds for all intermediate $\Z_p^2$-extensions $A/L'$ belonging to a given non-empty Zariski open subset of the Grassmannian $\mathrm{Gr}(d-2,d)(\Z_p)$. |
| title | $p$-adic $L$-functions for elliptic curves over global function fields |
| topic | Number Theory |
| url | https://arxiv.org/abs/2603.10576 |