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Some modifications of Sobolev spaces and non-linear boundary value problems. (English) Zbl 0404.35042
Equadiff IV, Proc., Prague 1977, Lect. Notes Math. 703, 213-223 (1979).

35J60 Nonlinear elliptic equations
35J40 Boundary value problems for higher-order elliptic equations
35D05 Existence of generalized solutions of PDE (MSC2000)
35J70 Degenerate elliptic equations
46E35 Sobolev spaces and other spaces of “smooth” functions, embedding theorems, trace theorems
47H05 Monotone operators and generalizations