Speaker
Geoffroy Horel
(Paris)
Description
I will explain an integral generalization of rational homotopy theory based on binomial commutative rings. I will then explain the construction of a derived binomial algebraic group over the integers which specializes to the pro-algebraic Grothendieck-Teichmüller group as well as the pro-p version for all prime p. I will finally describe the conjectural relationship between this group and the Tannakian Galois group of Nori motives with integral coefficients.
