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**An efficient higher-order quasilinearization method for solving nonlinear BVPs.**
*(English)*
Zbl 1397.34046

Summary: In this research paper, we present higher-order quasilinearization methods for the boundary value problems as well as coupled boundary value problems. The construction of higher-order convergent methods depends on a decomposition method which is different from Adomain decomposition method [S. S. Motsa and P. Sibanda, Numer. Algorithms 63, No. 3, 399–417 (2013; Zbl 1271.65115)]. The reported method is very general and can be extended to desired order of convergence for highly nonlinear differential equations and also computationally superior to proposed iterative method based on Adomain decomposition because our proposed iterative scheme avoids the calculations of Adomain polynomials and achieves the same computational order of convergence as authors have claimed in [loc. cit.]. In order to check the validity and computational performance, the constructed iterative schemes are also successfully applied to bifurcation problems to calculate the values of critical parameters. The
numerical performance is also tested for one-dimension Bratu and Frank-Kamenetzkii equations.

### MSC:

34B15 | Nonlinear boundary value problems for ordinary differential equations |

65L10 | Numerical solution of boundary value problems involving ordinary differential equations |

65L20 | Stability and convergence of numerical methods for ordinary differential equations |

65Y20 | Complexity and performance of numerical algorithms |