This paper is concerned with the error behaviour of Runge-Kutta methods ap- plied to some classes of one-parameter multiple stiff singularly perturbed problems with delays. We derive the global error estimate of algebraically and diagonally stable Runge-Kutta methods with Lagrange interpolation procedure. Numerical experiments confirm our theoretical analysis.
In this paper we consider mainly low order symplectic (or linear symplectic)partitioned Runge-Kutta methods of one kind of Hamiltonian systems for wave equations. Stability conditions for all two-stage explicitly partitioned Runge-Kutta methods with order 2 are disscussed. In addition some methods with low-order are applied to more general wave equations.
