A Lie Group which has a simply connected covering group Homeomorphic to . The prototype is any connected closed subgroup of upper Triangular Complex Matrices. The Heisenberg Group is such a group.

**References**

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

© 1996-9

1999-05-26