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In mathematics, a quaternionic discrete series representation is a discrete series representation of a semisimple Lie group G associated with a quaternionic structure on the symmetric space of G. They were introduced by {{harvs|txt|last=Gross|last2=Wallach|year1=1994|year2=1996}}. Quaternionic discrete series representations exist when the maximal compact subgroup of the group G has a normal subgroup isomorphic to SU(2). Every complex simple Lie group has a real form with quaternionic discrete series representations. In particular the classical groups SU(2,n), SO(4,n), and Sp(1,n) have quaternionic discrete series representations. Quaternionic representations are analogous to holomorphic discrete series representations, which exist when the symmetric space of the group has a complex structure. The groups SU(2,n) have both holomorphic and quaternionic discrete series representations. See also- Quaternionic symmetric space
References- {{Citation | last1=Gross | first1=Benedict H. | last2=Wallach | first2=Nolan R | editor1-last=Brylinski | editor1-first=Jean-Luc | editor2-last=Brylinski | editor2-first=Ranee | editor2-link = Ranee Brylinski | editor3-last=Guillemin | editor3-first=Victor | editor4-last=Kac | editor4-first=Victor | title=Lie theory and geometry | chapter-url=https://books.google.com/books?ei=MIB-Tp3wO4XkiAKwy6G6Aw | publisher=Birkhäuser Boston | location=Boston, MA | series=Progr. Math. | isbn=978-0-8176-3761-3 |mr=1327538 | year=1994 | volume=123 | chapter=A distinguished family of unitary representations for the exceptional groups of real rank =4 | pages=289–304}}
- {{Citation | last1=Gross | first1=Benedict H. | last2=Wallach | first2=Nolan R | title=On quaternionic discrete series representations, and their continuations | doi=10.1515/crll.1996.481.73 |mr=1421947 | year=1996 | journal=Journal für die reine und angewandte Mathematik | issn=0075-4102 | volume=481 | issue=481 | pages=73–123}}
External links- {{citation|title=Some facts about discrete series (holomorphic, quaternionic) |url=http://www.math.umn.edu/~garrett/m/v/facts_discrete_series.pdf |first= Paul |last=Garrett|year=2004}}
1 : Representation theory |