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Sobolev spaces of variable order and problems of convexity for partial differential operators with constant coefficients. (English) Zbl 0278.46034

Astérisque 2/3, 325-341 (1973).
For the entire collection see [Zbl 1384.35003].

MSC:

46E35 Sobolev spaces and other spaces of “smooth” functions, embedding theorems, trace theorems
35E10 Convexity properties of solutions to PDEs with constant coefficients
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