Abstract
In this work, a novel compact difference scheme for the generalized Rosenau-KdV-RLW equation is investigated, which preserves some conservative properties of the original equation. The proposed numerical scheme is three-level and nonlinear implicit, which adopts a novel approximation \(\displaystyle \frac{1}{4}(U^{n+1}_{j}+2U^{n}_{j}+U^{n-1}_{j})\) of \(u(x_{j},t_{n})\) in the temporal direction and a direct compact discretization method for the higher-order derivatives \(u_{xxx}\) and \(u_{xxxx}\) in the spatial direction. The discrete conservation laws are given, and a priori estimates of the difference solution in maximum norm are obtained by applying mathematical induction. The solvability of the proposed numerical scheme is proved by the well-known Brouwer’s fixed point theorem. The convergence with \(O(\tau ^{2}+h^{4})\) convergence order and stability of the novel difference scheme in \(L^{\infty }\) norm are proved. A linearized iterative algorithm for solving nonlinear algebraic systems generated by the compact scheme is proposed and its convergence is proved. Some numerical experimental results validate the theoretical results and demonstrate that the proposed compact scheme is efficient and reliable.
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Acknowledgements
The first author’s work is supported partially by the Natural Science Foundation of Liaoning Province of China (No. 2022-BS-093) and the Fundamental Research Funds for the Central Universities (No. 3132022202). The third author’s work is supported partially by the “Educational Science Planning Projects of Liaoning Province of China (JG21DB065)”. The authors would like to thank the editors and anonymous reviewers for their valuable comments and suggestions, which are very helpful for improving the quality of the article.
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Li, S., Kravchenko, O.V. & Qu, K. On the L\(^{\infty }\) convergence of a novel fourth-order compact and conservative difference scheme for the generalized Rosenau-KdV-RLW equation. Numer Algor 94, 789–816 (2023). https://doi.org/10.1007/s11075-023-01520-1
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DOI: https://doi.org/10.1007/s11075-023-01520-1