Annales Academiae Scientiarum Fennicae Series A I Mathematica · 1969 · 142 citations · 4 references
Natural SciencesMathematicsDifferential EquationsHarmonic AnalysisOperator TheoryPartial Differential EquationsElliptic FunctionsElliptic Partial Differential EquationsHarmonic MapsQuasiconformal Mappings
tt) : /u, f io, where -L, and L, are certain second order elliptic differential operators.
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