HULL-MINIMAL IDEALS IN THE SCHWARTZ ALGEBRA OF THE HEISENBERG-GROUP

For every closed subset C in the dual space (H) over cap(n) of the Hei senberg group H-n we describe via the Fourier transform the elements o f the hull-minimal ideal j(C) of the Schwartz algebra S(H-n) and we sh ow that in general for two closed subsets C-1, C-2 of (H) over cap(n), the product of j(C-1) and j(C-2) is different from j(C-1 boolean AND C-2).