Speaker: Haluk Sengun
Date: 10:30 23/09/2022
Title: Periods of Bianchi modular forms

Abstract: Bianchi modular forms are modular forms for GL(2) over imaginary quadratic fields. While the investigation of their aritmetic properties go back to the mid 1970s, for decades, they have been viewed as 'exotic' cousins of the much studied and well-understood Hilbert modular forms. However, 
thanks to recent progress, things have improved and Bianchi modular forms have gained much attention.
In this talk, I will survey some of the basic aspects of Bianchi groups and Bianchi modular forms, focusing 
on the weight 2 forms and their periods. Time permitting, I will talk about mod p Bianchi modular forms 
(these are defined using cohomology) and indicate some speculations about their 'periods'.