On the faithfulness of parabolic cohomology as a Hecke module over a finite field

Research paper by Gabor Wiese

Indexed on: 15 Feb '06Published on: 15 Feb '06Published in: Mathematics - Number Theory


In this article we prove conditions under which a certain parabolic group cohomology space over a finite field F is a faithful module for the Hecke algebra of Katz modular forms over an algebraic closure of F. These results can e.g. be used to compute Katz modular forms of weight one with methods of linear algebra over F. This is essentially Chapter 3 of my thesis.