We show that in the presence of suitable commutator estimates, a projective unitary representation of the Lie algebra of a connected and simply connected Lie group G exponentiates to G. Our proof does not assume G to be finite-dimensional or of Banach Lie type and therefore encompasses the diffeomor
Restrictions of Irreducible Unitary Representations of Nilpotent Lie Groups to Lattices
โ Scribed by M.B. Bekka; P. Driutti
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 172 KB
- Volume
- 168
- Category
- Article
- ISSN
- 0022-1236
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โฆ Synopsis
RESTRICTION OF REPRESENTATIONS
with Q-linearly independent real numbers : 1 , : 2 . Then
By Proposition 1.1, r l is not contained in a proper rational ideal of g. So, ? l | 1 is irreducible, by Theorem 1.1. Now, if f =n 4 X 4 *+n 5 X 5 * # g* with n 4 , n 5 # Z&[0] then it is easy to see that f +l ร O G (l ), that is, ? f +l $ 3 ? l , whereas ? f +l |
๐ SIMILAR VOLUMES
Let G be a nilpotent locally compact group. The lower multiplicity M L (?) is defined for every irreducible representation ? of G, which does not form an open point in the dual space G of G. It is shown that M L (?)=1 if either G is connected or ? is finite dimensional. Conversely, for G a nilpotent
Communicated by W