Zuckerman functor explained

In mathematics, a Zuckerman functor is used to construct representations of real reductive Lie groups from representations of Levi subgroups. They were introduced by Gregg Zuckerman (1978). The Bernstein functor is closely related.

Notation and terminology

Definition

The Zuckerman functor Γ is defined by

g,K
\Gamma
g,L\capK

(W)=\homR(g,L\cap(R(g,K),W)K

and the Bernstein functor Π is defined by

g,K
\Pi
g,L\capK

(W)=R(g,K)R(g,L\capW.

References