Twisted spherical functions on the finite Poincaré upper half-plane
In this paper explicit formulae for the twisted spherical functions for the finite analogue of the classical Poincaré upper half plane in any characteristic are computed. The authors obtain a uniform description of these twisted functions resembling the one given by \textit{C. W. Curtis} [J. Algebra 157, 517-533 (1993; Zbl 0787.20026)] for the characters of the commuting algebra of the Gel'fand-Graev representation.
scientific article; zbMATH DE number 1749648
scientific article