ds={
class = "MpdfDS";
mpdf = {
  class = "mlnorm<ldmat>";
  A = ( "matrix", 1, 2, [ 0.5, -0.1 ] );
  R = ( "matrix", 1, 1, [ 1e-10 ] );
  const =  ( "matrix", 1, 1, [ 0.0 ] );
  rv = {
    class = "RV";
    names = ( "a" );
  };
  rvc = {
    class = "RV";
    names = ( "a", "b" );
	 times = [-1 , 0];
  };
};
};