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Number Theory Seminar

Title: Galois Families of Modular Forms
Speaker: Gabor Wiese (University of Luxembourg)
Date: 11 February 2022
Time: 3 pm
Venue: Microsoft Teams (Online)

Following a joint work with Sara Arias-de-Reyna and Fran├žois Legrand, we present a new kind of families of modular forms. They come from representations of the absolute Galois group of rational function fields over $\mathbb{Q}$. As a motivation and illustration, we discuss in some details one example: an infinite Galois family of Katz modular forms of weight one in characteristic $7$, all members of which are non-liftable. This may be surprising because non-liftability is a feature that one might expect to occur only occasionally.

Contact: +91 (80) 2293 2711, +91 (80) 2293 2265 ;     E-mail: chair.math[at]iisc[dot]ac[dot]in
Last updated: 09 Dec 2022