Speaker: Payman Eskandari (Toronto, Canada).
Date: 15/10/2021 at 10:30
Title: Mixed motives with large unipotent radicals

Abstract: The motivic Galois group of a (mixed) motive over a number field
is a group associated to the motive using Tannakian formalism.
Grothendieck's period conjecture predicts that the dimension of the
motivic Galois group should be equal to the transcendence degree of the
field generated by the periods of the motive. In this talk, we will
discuss some recent results on unipotent radicals of motivic Galois
groups, and discuss how the results can be used to obtain motives with
large unipotent radicals (here, by large we mean as large as possible). We
will look at some examples in the category of mixed Tate motives, ending
with some questions about periods. The talk is on a joint work with Kumar
Murty.