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Open AccessArticle

ρ — Adic Analogues of Ramanujan Type Formulas for 1/π

1
Department of Mathematics and Statistics, University of Calgary, Calgary AB, T2N 1N4, Canada
2
Department of Mathematics, University of Washington, Seattle, WA 98195, USA
3
Department of Mathematics, Cornell University, Ithaca, NY 14853, USA
4
Department of Mathematics, Iowa State University, Ames, IA 50011, USA
5
Lehrstuhl D für Mathematik, RWTH Aachen University, 52056 Aachen, Germany
6
Department of Mathematics, Oregon State University, Corvallis, OR 97331, USA
*
Author to whom correspondence should be addressed.
Mathematics 2013, 1(1), 9-30; https://doi.org/10.3390/math1010009
Received: 18 February 2013 / Revised: 26 February 2013 / Accepted: 1 March 2013 / Published: 13 March 2013
Following Ramanujan's work on modular equations and approximations of π, there are formulas for 1/π of the form Following Ramanujan's work on modular equations and approximations of π, there are formulas for 1/π of the form k = 0 ( 1 2 ) k ( 1 d ) k ( d - 1 d ) k k ! 3 ( a k + 1 ) ( λ d ) k = δ π for d=2,3,4,6, where łd are singular values that correspond to elliptic curves with complex multiplication, and a,δ are explicit algebraic numbers. In this paper we prove a p-adic version of this formula in terms of the so-called Ramanujan type congruence. In addition, we obtain a new supercongruence result for elliptic curves with complex multiplication. View Full-Text
Keywords: Ramanujan type supercongruences; Atkin and Swinnerton-Dyer congruences; hypergeometric series; elliptic curves; complex multiplication; periods; modular forms; Picard–Fuchs equation Ramanujan type supercongruences; Atkin and Swinnerton-Dyer congruences; hypergeometric series; elliptic curves; complex multiplication; periods; modular forms; Picard–Fuchs equation
MDPI and ACS Style

Chisholm, S.; Deines, A.; Long, L.; Nebe, G.; Swisher, H. ρ — Adic Analogues of Ramanujan Type Formulas for 1/π. Mathematics 2013, 1, 9-30. https://doi.org/10.3390/math1010009

AMA Style

Chisholm S, Deines A, Long L, Nebe G, Swisher H. ρ — Adic Analogues of Ramanujan Type Formulas for 1/π. Mathematics. 2013; 1(1):9-30. https://doi.org/10.3390/math1010009

Chicago/Turabian Style

Chisholm, Sarah; Deines, Alyson; Long, Ling; Nebe, Gabriele; Swisher, Holly. 2013. "ρ — Adic Analogues of Ramanujan Type Formulas for 1/π" Mathematics 1, no. 1: 9-30. https://doi.org/10.3390/math1010009

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