A contractivity theory of Runge—Kutta methods for stiff nonlinear Volterra functional differential equations (VFDEs) is established, by means of which a family of high order contractive Runge—Kutta ...

This paper is concerned with numerical stability of nonlinear systems of pantograph equations. Numerical methods based on (k,l)—algebraically stable Runge-Kutta methods are suggested. Global and ...