Abstract
The hierarchy of coupled Boussinesq equations related to a \(4\times 4\) matrix spectral problem is derived by using the zero-curvature equation and Lenard recursion equations. The characteristic polynomial of the Lax matrix is employed to introduce the associated tetragonal curve and Riemann theta functions. The detailed theory of resulting tetragonal curves is established by exploring the properties of Baker–Akhiezer functions and a class of meromorphic functions. The Abel map and Abelian differentials are used to precisely determine the linearization of various flows. Finally, algebro-geometric solutions for the entire hierarchy of coupled Boussinesq equations are obtained.
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Acknowledgements
This work is supported by National Natural Science Foundation of China (Grant Nos. 11931017, 11971441, 11971442, 12371253) and Natural Science Foundation of Henan Province (Grant No. 232300421074).
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Geng, X., Jia, M., Xue, B. et al. Application of tetragonal curves to coupled Boussinesq equations. Lett Math Phys 114, 30 (2024). https://doi.org/10.1007/s11005-024-01780-5
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DOI: https://doi.org/10.1007/s11005-024-01780-5
Keywords
- Tetragonal curve
- Coupled Boussinesq equation
- Baker–Akhiezer function
- Riemann theta function
- Algebro-geometric solutions