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An eighth-order exponentially fitted two-step hybrid method of explicit type for solving orbital and oscillatory problems

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Abstract

The construction of an eighth-order exponentially fitted (EF) two-step hybrid method for the numerical integration of oscillatory second-order initial value problems (IVPs) is considered. The EF two-step hybrid methods integrate exactly differential systems whose solutions can be expressed as linear combinations of exponential or trigonometric functions and have variable coefficients depending on the frequency of each problem. Based on the order conditions and the EF conditions for this class of methods, we construct an explicit EF two-step hybrid method with symmetric nodes and algebraic order eight which only uses seven function evaluations per step. This new method has the highest algebraic order we know for the case of explicit EF two-step hybrid methods. The numerical experiments carried out with several orbital and oscillatory problems show that the new eighth-order EF scheme is more efficient than other standard and EF two-step hybrid codes recently proposed in the scientific literature.

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Authors and Affiliations

  1. IUMA, Departamento de Matemática Aplicada, Pza. San Francisco s/n., Universidad de Zaragoza, Zaragoza, 50009, Spain

    J. M. Franco & L. Rández

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  1. J. M. Franco
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  2. L. Rández
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Correspondence to J. M. Franco.

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Franco, J.M., Rández, L. An eighth-order exponentially fitted two-step hybrid method of explicit type for solving orbital and oscillatory problems. Numer Algor 78, 243–262 (2018). https://doi.org/10.1007/s11075-017-0374-1

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  • DOI: https://doi.org/10.1007/s11075-017-0374-1

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