arminstraub.com

Talk: A solution of Sun's $520 challenge concerning 520/pi (SIAM)

A solution of Sun's $520 challenge concerning 520/pi (SIAM)

Date: 2013/07/10
Occasion: SIAM Annual Meeting, Minisymposium on Symbolic Computation and Special Functions
Place: San Diego, CA

Abstract

Series for \(1/\pi\) and their relation to modular forms have a long history going back to Ramanujan. We will review this connection and give a brief account of the history. We then indicate how to prove a Ramanujan-type formula for \(520/\pi\) that was conjectured by Zhi-Wei Sun. A key ingredient is a hypergeometric representation of the relevant double series, which relies on a recent generating function for Legendre polynomials by James Wan and Wadim Zudilin. For the purpose of the present minisymposium, a particular focus will be on the symbolic computation of singular moduli for modular functions such as, but not limited to, the classical \(j\)-function. Methods made possible by computer algebra as well as future challenges will be discussed. This talk is based on joint work with Mathew D. Rogers.

Download

LinkSizeDescriptionHits
866.23 KB Slides (PDF, 53 pages) 1389