A Note on the Construction of Crouch-Grossman Methods

Numerical integration methods based on rigid frames were introduced by Crouch and Grossman. The order theory of these methods were later analyzed by Owren and Marthinsen. The resulting order conditions are difficult to solve due to nonlinear relations on the weights of the methods. In this paper we propose a variant of the Crouch-Grossman method that uses modified vector fields so that the order conditions of this new method coincide with the classical order conditions for Runge-Kutta methods.

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