Project IV (MATH4072) 2026-27


Topics in Modular Forms

Jens Funke

Description

In this project, I offer, based on the first term of TAG IV (modular forms) several to[ics in the theory of modular forms. Among these are
  • Congruences. Ramanujan found a spectacular congruence of his mysterious tau-function (the Fourier coefficients of the discriminant function) with a divisor sums function, a much more elementary function:
  • This is only one example of a much general phenomenen which we study systematically. 

  • Modular Forms and Algebraic Number Theory: Let K be an imaginary quadratric field. Then to every ideal class of K one can assciate an anamytic object, it's so-called L-function which encodes important information about K but is also closely related to modfular forms. In this way we can study the arithmetic of K using modular forms. The connection goes actually much deeper and is very conceptual. It is an instant of the celebrated Langlands Programme; one of the most fundamental theme in mathematics of our time.

Depending on interest we can also look at other topics in the theory of modular forms.

Please note that on term 2 I will be away on research leave and the supervision will happen remotely during that period.

Resources

Depend on the chosen topic. For further questions feel free to see me.

Prerequisites

  • Topics in Algebra and Geometry IV.
  • For some of the topics Number Theory III and/or Representation Theory IV will be helpful.

email: J Funke