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Showing 1 to 2 of 2 for “"Shilov spaces"”.
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Laplacians on Nonisotropic Heisenberg Groups with Multi-Dimensional Center
… in the Schwartz space and in the Gelfand-Shilov spaces using the Green functions of the twisted Laplacians. Global regularity in a scale of Sobolev spaces of these twisted Laplacians is given. Equally important are the heat semigroups generated by the twisted Laplacians in terms of Weyl …
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Global normal forms and global properties in function spaces for second order Shubin type operators
… type differential operators P(x;D) in functional spaces on Rn. We describe the isomorphism properties of normal form transformations, introduced by L. Hormander for the study of affine symplectic transformations acting on pseudodifferential operators, in spaces like the Schwartz class, the …