Mathematics – Analysis of PDEs
Scientific paper
2012-03-05
Mathematics
Analysis of PDEs
17 pages
Scientific paper
We describe boundedness and compactness properties for the operators obtained by the Weyl-Pedersen calculus in the case of the irreducible unitary representations of nilpotent Lie groups that are associated with flat coadjoint orbits. We use spaces of smooth symbols satisfying appropriate growth conditions expressed in terms of invariant differential operators on the coadjoint orbit under consideration. Our method also provides conditions for these operators to belong to one of the Schatten ideals of compact operators. In the special case of the Schr\"odinger representation of the Heisenberg group we recover some classical properties of the pseudo-differential Weyl calculus, as the Calder\'on-Vaillancourt theorem, and the Beals characterization in terms of commutators.
Beltita Daniel
Beltita Ingrid
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