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The trace problem and Hardy operator for non-isotropic function spaces on the Heisenberg group. (English) Zbl 0813.31005
The author proves trace and extension theorems for non-isotropic Sobolev space functions and Besov space functions on the Heisenberg group.

31B20 Boundary value and inverse problems for harmonic functions in higher dimensions
43A15 \(L^p\)-spaces and other function spaces on groups, semigroups, etc.
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