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A generalized boundary value problem for uxy=f (x, y, u, ux, uy)

✍ Scribed by J. Conlan

Publisher
Springer
Year
1963
Tongue
English
Weight
396 KB
Volume
13
Category
Article
ISSN
0003-9527

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We provide a contact invariant characterization for equations of the form u xy +a(x, y, u) u x +b(x, y, u) u y +c(x, y, u)=0, u xy +a(x, y) u x +b(x, y) u y +c(x, y, u)=0, We classify all equations of the form u xy + f (x, y, u, u x , u y )=0 for which the two Ovsiannikov's invariants are constants