p-adic properties of division polynomials and algebraic sigma functions
김수현
129동 101호
0
2201
2025.09.04 10:20
| 구분 | 수학강연회 |
|---|---|
| 일정 | 2025-10-16(목) 16:00~17:00 |
| 세미나실 | 129동 101호 |
| 강연자 | Kobayashi Shinichi (Kyushu University) |
| 담당교수 | 정인지 |
| 기타 |
Let E be an elliptic curve defined over a finite extension of Q_p.
Let F_n denote the n-division polynomial of E, and let P be a K-rational point.
It is known that the sequence (F_n(P))_n forms an elliptic divisibility sequence, a subject that has been studied by many authors-among them Ward, Shipsey, and Silverman- from various perspectives.
Silverman proved that when E has good ordinary reduction, this sequence admits a p-adically convergent subsequence whose limit is algebraic if both E and P are defined over a number field.
We remove the ordinarity assumption and give an explicit description of the limit in terms of Mumford’s algebraic theta function.