Abstract
Let G be a semi-simple simply connected Lie group and K be a subgroup, maximal among the subgroups compact modulo the center. Invariant eigendistributions on G can be restricted to K. It is an irritating fact that, without supplementary assumptions, this restriction does not determine the distribution. However, we prove here that this is true if, instead of a single invariant eigendistribution, one considers a family of invariant eigendistributions, coherent in the sense of W. Schmid. We also study non connected semi-simple groups: we define a notion of coherent family of invariant eigendistributions and prove a unicity theorem in this setting.
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Duflo, M., Vergne, M. (1994). Familles cohérentes sur les groupes de Lie semi-simples et restriction aux sous-groupes compacts maximaux. In: Brylinski, JL., Brylinski, R., Guillemin, V., Kac, V. (eds) Lie Theory and Geometry. Progress in Mathematics, vol 123. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4612-0261-5_6
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DOI: https://doi.org/10.1007/978-1-4612-0261-5_6
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