Stability and convergence of multi-product expansion splitting methods with negative weights for semilinear parabolic equations
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914348763447296 |
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| author | Duan, Xianglong Quan, Chaoyu Yang, Jiang Zhu, Zijing |
| author_facet | Duan, Xianglong Quan, Chaoyu Yang, Jiang Zhu, Zijing |
| contents | The operator splitting method has been widely used to solve differential equations by splitting the equation into more manageable parts. In this work, we resolves a long-standing problem -- how to establish the stability of multi-product expansion (MPE) splitting methods with negative weights. The difficulty occurs because negative weights in high-order MPE method cause the sum of the absolute values of weights larger than one, making standard stability proofs fail. In particular, we take the semilinear parabolic equation as a typical model and establish the stability of arbitrarily high-order MPE splitting methods with positive time steps but possibly negative weights. Rigorous convergence analysis is subsequently obtained from the stability result. Several numerical experiments validate the stability and accuracy of various high-order MPE splitting methods, highlighting their efficiency and robustness. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_12481 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stability and convergence of multi-product expansion splitting methods with negative weights for semilinear parabolic equations Duan, Xianglong Quan, Chaoyu Yang, Jiang Zhu, Zijing Numerical Analysis 65M12, 65M15 The operator splitting method has been widely used to solve differential equations by splitting the equation into more manageable parts. In this work, we resolves a long-standing problem -- how to establish the stability of multi-product expansion (MPE) splitting methods with negative weights. The difficulty occurs because negative weights in high-order MPE method cause the sum of the absolute values of weights larger than one, making standard stability proofs fail. In particular, we take the semilinear parabolic equation as a typical model and establish the stability of arbitrarily high-order MPE splitting methods with positive time steps but possibly negative weights. Rigorous convergence analysis is subsequently obtained from the stability result. Several numerical experiments validate the stability and accuracy of various high-order MPE splitting methods, highlighting their efficiency and robustness. |
| title | Stability and convergence of multi-product expansion splitting methods with negative weights for semilinear parabolic equations |
| topic | Numerical Analysis 65M12, 65M15 |
| url | https://arxiv.org/abs/2505.12481 |