Subject: projective representations
Date: Tue, 14 Jan 2003 18:55:16 -0500 (EST)
From: Ping Xu
I wonder if you know any good references on projective representations, and
in particular an answer to the following question:
Let $G$ be a Lie group, and $\alpaha \in H^3 (BG, Z)$ so that it determines
a central extension of $G$. Assume that $\alpha$ is a torsion,
i.e., $n \alpha =0$ for some integer $n$.
Does $G$ always admit a projective representation?
Thanks a lot,
Ping Xu