# Seminars & Colloquia Calendar

Colloquia

## Identities for $$1/\pi^2$$ and special hypergeometric motives

#### John Voight (Dartmouth)

Location:  Hill 705
Date & time: Wednesday, 13 November 2019 at 3:30PM - 4:30PM

Abstract:  More than a century ago, Ramanujan discovered remarkable formulas for $$1/\pi$$. Inspired by these discoveries, similar Ramanujan-like expressions for $$1/\pi^2$$ have been uncovered recently by Guillera.  We explain the provenance of these formulas: we recognize certain special hypergeometric motives as arising from Hilbert modular forms in an explicit way.

This is joint work with Lassina Demb\'el\'e, Alexei Panchishkin, and Wadim Zudilin.

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