Let be a unitary Representation of a Group on a separable Hilbert Space, and let be the smallest weakly closed algebra of bounded linear operators containing all for . Then is primary if the center of consists of only scalar operations.

**References**

Knapp, A. W. ``Group Representations and Harmonic Analysis, Part II.'' *Not. Amer. Math. Soc.* **43**,
537-549, 1996.

© 1996-9

1999-05-26