interpolation spaces and unitary representations - American
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interpolation spaces and unitary representations - American
there is a continuous scale 3C(w), s > 0, of G-invariant Hubert spaces. When .... order k + 2m â 1 of being Lipschitz continuous of exponent a, for any a < 1.
proceedings of the american mathematical
society
Volume 83, Number 1, September 1981
INTERPOLATION SPACES AND UNITARY REPRESENTATIONS ROE GOODMAN1 Abstract. Let G be a Lie group, ir a unitary representation of G on a Hubert space DC(ir), and 3C*(ir) the subspace of C* vectors for m. By quadratic interpolation there is a continuous scale 3C(w), s > 0, of G-invariant Hubert spaces. When G — H ■K is a semidirect product of closed subgroups, then it is proved that D(?(7r)= 1