We give a modified block-by-block method for the nonlinear fractional order Volterra integral equation system by using quadratic Lagrangian interpolation based on the classical block-by-block method. The core of the method is that we divide its domain into a series of subdomains, that is, block it, and use piecewise quadratic Lagrangian interpolation on each subdomain to approximate $ \mathit{\boldsymbol{\kappa}}(x, y, s, r, u(s, r)) $. Our proposed method has uniform accuracy and its convergence order is $ O(h_x^{4-\alpha}+h_y^{4-\beta}) $. We give a strict proof for the error analysis of the method, and give several numerical examples to verify the correctness of the theoretical analysis.
Citation: Ziqiang Wang, Qin Liu, Junying Cao. A higher-order numerical scheme for system of two-dimensional nonlinear fractional Volterra integral equations with uniform accuracy[J]. AIMS Mathematics, 2023, 8(6): 13096-13122. doi: 10.3934/math.2023661
We give a modified block-by-block method for the nonlinear fractional order Volterra integral equation system by using quadratic Lagrangian interpolation based on the classical block-by-block method. The core of the method is that we divide its domain into a series of subdomains, that is, block it, and use piecewise quadratic Lagrangian interpolation on each subdomain to approximate $ \mathit{\boldsymbol{\kappa}}(x, y, s, r, u(s, r)) $. Our proposed method has uniform accuracy and its convergence order is $ O(h_x^{4-\alpha}+h_y^{4-\beta}) $. We give a strict proof for the error analysis of the method, and give several numerical examples to verify the correctness of the theoretical analysis.
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Ziqiang Wang, Qin Liu, Junying Cao. A higher-order numerical scheme for system of two-dimensional nonlinear fractional Volterra integral equations with uniform accuracy[J]. AIMS Mathematics, 2023, 8(6): 13096-13122. doi: 10.3934/math.2023661
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