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Variable-step explicit two-step Runge-Kutta methods for the numerical solution of ordinary differential equations are studied. Order conditions are derived and the results about the minimal number of ...
SIAM Journal on Numerical Analysis, Vol. 9, No. 3 (Sep., 1972), pp. 389-405 (17 pages) Conditions are derived which suffice to establish the order of a Runge-Kutta method. Basic implicit and explicit ...