Group algebras Hecke algebras 2 Representations of groups 2 Abelian groups 1 C*-algebras 1 Commutative algebra 1 Crossed products 1 Finite groups 1 Fourier analysis 1 Frobenius algebras 1 Group theory 1 Homology theory 1 Idempotents 1 Locally compact groups 1 Matrices 1 Modular representations of groups 1 Non-Abelian groups 1 Stieltjes transform 1 Topological groups 1