Difference schemes for Hamiltonian formalism and symplectic geometry
Journal of Computational Mathematics
Order and stability of generalized Padé approximations
Applied Numerical Mathematics
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Constructing multi-step difference schemes is important for solving ODE numerically. In this paper, by using an algebraic function approximation to the exponent function, linear multi-step schemes for solving ODE are deduced. The approximation order of this linear multi-step scheme equals that of the algebraic function approximation to e^z. Moreover, we show that the linear n-step difference scheme of order 2n is unstable, which is proved in a novel way.