A family of Ramanujan-Orr formulas for 1/π

2015/01/26 by Jesús Guillera, Guillera, Jesús
Mathematics · #Advanced Mathematical Identities #Analytic Number Theory Research #Graph theory and applications

paper · pdf · doi:10.48550/arxiv.1501.06413

Abstract

We use a variant of Wan's method to prove two Ramanujan-Orr type formulas for 1/π. This variant needs to know in advance the formulas for 1/π that we want to prove, but avoids the need of solving a system of equations.

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