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”
Treves, François
Bull. Amer. Math. Soc., Tome 68 (1962) no. 6, / Harvested from Project Euclid
Publié le : 1962-07-14
Classification: 
@article{1183524667,
     author = {Treves, Fran\c cois},
     title = {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''},
     journal = {Bull. Amer. Math. Soc.},
     volume = {68},
     number = {6},
     year = {1962},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1183524667}
}
Treves, François. 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”. Bull. Amer. Math. Soc., Tome 68 (1962) no. 6, . http://gdmltest.u-ga.fr/item/1183524667/