# SO(p,q) and Howe Duality

I recently learned of a relationship between the representations of the groups $SO(p,q)$ and $SL(2,\mathbb{R})$ which is part of an apparently much larger set of ideas known as Howe Duality. My question is a bit open ended, but can someone point me to a good entry point (review articles, lectures) for learning more about Howe duality and in particular the $SO(p,q)$-$SL(2,\mathbb{R})$ duality? Thanks.

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It is related to Capelli identities see wiki and ref therein. Sorry need to run now. –  Alexander Chervov Jan 23 '12 at 7:08
–  Alexander Chervov Jan 24 '12 at 5:58

Jeffrey -- thanks for the reference -- and for your previous answer to what is known about the unitary dual of $O(p,q)$. –  Mark Mueller Jan 23 '12 at 22:03