Derived Hecke action for weight one modular forms via classicality

Add to your list(s) Download to your calendar using vCal

• Gyujin Oh (Columbia University)
• Tuesday 04 November 2025, 14:30-15:30
• MR13.

If you have a question about this talk, please contact Bence Hevesi.

It is known that a p-adic family of modular forms does not necessarily specialize into a classical modular form at weight one, unlike the modular forms of weight 2 or higher. We will explain how this “obstruction to classicality” leads to a derived action on modular forms of weight one, which can also be understood as the so-called derived Hecke operator at p. We will discuss the role of the derived action in the study of p-adic periods of the adjoint of the weight one modular forms.

This talk is part of the Number Theory Seminar series.

This talk is included in these lists:

• All CMS events
• All Talks (aka the CURE list)
• CMS Events
• DPMMS Lists
• DPMMS Pure Maths Seminar
• DPMMS info aggregator
• DPMMS lists
• Hanchen DaDaDash
• Interested Talks
• MR13
• Number Theory Seminar
• School of Physical Sciences
• bld31

Note that ex-directory lists are not shown.