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The object of this work is the estimate of the global error in the numerical solution of the IVP for a system of ODE's. Given a Runge–Kutta formula of order q, which yields an approximation y n to the true value y(x n ), a general, parallel method is presented, that provides a second value y n * of order q+2; the global error e n =y n −y(x n ) is then(More)
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