Minimizes the function of several variables by using the Marquardt optimization method with no log.

function Marquardt(Fun: TRealFunction; GradHess: TGradHess; var Pars: Array of double; Const Consts: array of double; Const ObjConst: Array of TObject; out FMin: double; IHess: TMtx; out StopReason: TOptStopReason; const FloatPrecision: TMtxFloatPrecision; MaxIter: Integer; Tol: double; GradTol: double; Lambda0: double): Integer; overload;