Abstract
For a higher-order inhomogeneous equation of mixed elliptic-hyperbolic type, the property of the solution to be of fixed sign is established, depending on the sign of the right-hand side.
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Original Russian Text © K. B. Sabitov, 2016, published in Matematicheskie Zametki, 2016, Vol. 100, No. 3, pp. 433–440.
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Sabitov, K.B. Solutions of fixed sign of higher-order inhomogeneous equations of mixed elliptic-hyperbolic type. Math Notes 100, 458–464 (2016). https://doi.org/10.1134/S0001434616090121
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DOI: https://doi.org/10.1134/S0001434616090121