1/N series for quantum anharmonic oscillator eigenvalues and Green functions

The large orders of the 1/N series for the O(N)-symmetric anharmonic oscillator are computed here in the functional approach. We explicitly give the K th order of the 1/N series up to O(K-1) for all energy eigenvalues and for the two-point Green function. Our results are derived considering solutions in a finite (but large) time interval (euclidean time). (orig.)