Values of Dirichlet series associated with modular forms at the points S=1/2, 1

Let denote a parabolic form of even weights k which is an eigenfunction of all Hecke operators, and let be a real character. It is known that the Dirichlet series satisfies a functional equation of the Riemann type for. A number of asymptotic results on L_f(1/2,), L_f(1,) for d are proved.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 134, pp. 117–137, 1984.