Lawrence J. Christiano, Solving the Stochastic Growth Model by Linear-Quadratic Approximation and by Value-Function Iteration, Journal of Business & Economic Statistics, Vol. 8, No. 1 (Jan., 1990), pp ...

The zeta function Ϛ (A, s) associated with a narrow ideal class A for a real quadratic field can be decomposed into ΣQ ZQ (s), where ZQ (S) is a Dirichlet series associated with a quadratic form Q (x, ...