English

Ramanujan-like series for $1/\pi^2$ and String Theory

Number Theory 2012-03-22 v3

Abstract

Using the machinery from the theory of Calabi-Yau differential equations, we find formulas for 1/π21/\pi^2 of hypergeometric and non-hypergeometric types.

Keywords

Cite

@article{arxiv.1009.5202,
  title  = {Ramanujan-like series for $1/\pi^2$ and String Theory},
  author = {Gert Almkvist and Jesús Guillera},
  journal= {arXiv preprint arXiv:1009.5202},
  year   = {2012}
}

Comments

Some mistakes corrected and new formulas added

R2 v1 2026-06-21T16:19:25.192Z