The universal covering group G.- Representations.- Automorphic models.- Standard and Whittaker models.- Intertwining operators.- Fourier coefficients of automorphic models.- The operators ??.- Eisenstein models.- L2(?/G, X).- The analytic continuation of the Eisenstein model.- Spectral decomposition of eL2(?/G,X).- The space H ? ? .- Convolution operators.- Scalar product of Poincaré series.- Sum formula.