Figure 3From: A class of implicit symmetric symplectic and exponentially fitted Runge–Kutta–Nyström methods for solving oscillatory problemsNumerical Hamiltonian for the methods (a) DIRKN4(3), (b) DIRKNs3o4, (c) ISSRKNs2o4, (d) ISSEFRKNs2o4, (e) ISSEFMRKNs1o2, and (f) ISSEFMRKNs2o4 in Problem 3Back to article page