The equation $\left ( \{\partial ^2 /\partial x^2 + \partial ^2 /\partial y^2 + \left ( \{x^2 + y^2 \} \right )\left ( \{\partial /\partial t\} \right )\} \right )^2 u + \partial ^2 u/\partial t^2 = f$, with real coefficients, is “without solutions”
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- by François Treves PDF
- Bull. Amer. Math. Soc. 68 (1962), 332
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Additional Information
- Journal: Bull. Amer. Math. Soc. 68 (1962), 332
- DOI: https://doi.org/10.1090/S0002-9904-1962-10794-0
- MathSciNet review: 1566203