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|Title:||Degenerate principal series representations of U(p, q) and spin 0(p, q)|
|Authors:||Lee, S.T. |
Degenerate principal series
|Source:||Lee, S.T., Loke, H.Y. (2002). Degenerate principal series representations of U(p, q) and spin 0(p, q). Compositio Mathematica 132 (3) : 311-348. ScholarBank@NUS Repository. https://doi.org/10.1023/A:1016514211478|
|Abstract:||Let p > q and let G be the group U(p, q) or Spin0(p, q). Let P = LN be the maximal parabolic subgroup of G with Levi subgroup L ≅ M × U where (equation presented). Let χ be a one-dimensional character of M and τμ an irreducible representation of U with highest weight μ. Let πχ,μ be the representation of P which is trivial on N and πχ,μ|L = χ multiplication sign in box τμ. Let Ip,q be the Harish-Chandra module of the induced representation IndP Gπ χ,μ. In this paper, we shall determine (i) the reducibility of Ip,q, (ii) the K-types of all the irreducible subquotients of Ip,q when it is reducible, where K is the maximal compact subgroup of G, (iii) the module diagram of Ip,q (from which one can read off the composition structure), and (iv) the unitarity of Ip,q and its subquotients. Except in the cases q = p - 1 and q = 1, Ip,q is not K-multiplicity free.|
|Source Title:||Compositio Mathematica|
|Appears in Collections:||Staff Publications|
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