Continued fraction approximation for the nuclear matter response   function
  We use a continued fraction approximation to calculate the RPA response function of nuclear matter. The convergence of the approximation is assessed by comparing with the numerically exact response function obtained with a typical effective finite-range interaction used in nuclear physics. It is shown that just the first order term of the expansion can give reliable results at densities up to the saturation density value. 
J\'er\^ome Margueron (IPNO), J. Navarro (IFIC), Nguyen Van Giai   (IPNO), P. Schuck (IPNO)