Journal of Statistical Phj,sics, Vol. 86. Nos. 3/4, 1997. p. 803-819.
The standard mathematical expression for the response functions of the linear response theory for Markovian stochastic systems, constructed from the corresponding Fokker-Planck equation, is transformed into an expression which is very suitable for numerical simulations. The method is applied to a stochastic model for superparamagnetism presented previously by the authors. For convenient values of the parameters the model shows the phenomenon of stochastic resonance.