Abstract.
We construct a family of integrable hydrodynamic type systems with three independent and n ≥ 2 dependent variables in terms of solutions of a linear system of PDEs with rational coefficients. We choose the existence of a pseudopotential as a criterion of integrability. In the case n = 2 this family is a general solution of the classification problem for such systems. We also give an elliptic analog of this family in the case n > 2.
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Odesskii, A. A family of (2+1)-dimensional hydrodynamic type systems possessing a pseudopotential. Sel. math., New ser. 13, 727 (2008). https://doi.org/10.1007/s00029-008-0050-3
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DOI: https://doi.org/10.1007/s00029-008-0050-3