I've heard that representations (irreducible unitary ones?) representations of noncompact forms of simple Lie groups, e.g. the first example of such a group
SL(2, R), can be completely described and that there is a discrete and continuous part of the spectrum of
- How are those representations described?
- Do all unitary representations come from
- How are those related to representation of compact
- What happens in the flat limit between
Also, is it possible to answer the questions above simultaneously for all lie Lie groups, not just