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Hull-minimal ideals in the Schwartz algebra of the Heisenberg group

J. Ludwig (1998)

Studia Mathematica

For every closed subset C in the dual space Ĥ n of the Heisenberg group H n we describe via the Fourier transform the elements of the hull-minimal ideal j(C) of the Schwartz algebra S ( H n ) and we show that in general for two closed subsets C 1 , C 2 of Ĥ n the product of j ( C 1 ) and j ( C 2 ) is different from j ( C 1 C 2 ) .

Intertwined mappings

Jean Ecalle, Bruno Vallet (2004)

Annales de la Faculté des sciences de Toulouse : Mathématiques

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