Numerical Solution of Stiff and Oscillatory Problems using Third Derivative Trigonometrically Fitted Block Method

M. Kida; S. Adamu; O. O Aduroja; P. T Pantuvo

doi:10.46481/jnsps.2022.271

Authors

M. Kida Department of Mathematics, Modibbo Adama University Yola, Adamawa, Nigeria
S. Adamu
malgwisa@gmail.com
Department ofMathematics, Nigerian Army University Biu, Borno, Nigeria
O. O Aduroja Department of Mathematics, Osun State College of Education, Ilesha, Osun State
P. T Pantuvo Mathematics and Statistics Department, Federal University Wukari, Taraba, Nigeria

Keywords:

Initial Value Problems, Third derivative, Trigonometrically fitted block method, Oscillatory problems, Stability, Convergence

Abstract

This paper considered the formulation of continuous third derivative trigonometrically fitted method for the solution of oscillatory first order initial value problems using the technique of interpolation and collocation of the approximate solution by combining polynomial and trigonometric functions. Solving for the unknown parameters and substituting the results into the approximate solution yielded a continuous linear multistep method, which was evaluated at some selected grid points where two cases were considered at equal intervals to give the discrete schemes which are implemented in block form. The blocks are convergent and stable. Numerical experiments show that the methods compete favorably with existing method.This paper considered the formulation of continuous third derivative trigonometrically fitted block method for the solution of stiff and oscillatory problems. The development of the technique involved the interpolation and collocation of the approximate solution which is the combination of polynomial and trigonometric functions. Solving for the unknown parameters and substituting the results into the approximate solution yielded a continuous linear multistep method, which is evaluated at some selected grid points where two cases were considered at equal intervals to give the discrete schemes which are implemented in block form. The blocks are convergent and stable. Numerical experiments show that the methods compete favorably with existing method and efficient for the solution of stiff and oscillatory problems.

Dimensions

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