Selberg Trace Formula: Mathematics, Unitary Representation, Square Integrable Function, Lie Group

Zonal Spherical Function: Function, Locally Compact Group, Mathematics, Matrix Coefficient, Irreducible Representation, Unitary Representation

Walsh Function: Orthogonal, Square Integrable, Function (Mathematics)

Representation Theory of SL2(R): Mathematics, Unitary Representation, Lie Group, Israel Gelfand

Orbit Method: Mathematics, Unitary Representation, Lie Group, Coadjoint Orbit, Group Action, Algebra, Alexandre Kirillov