Reference request: injective homomorphisms between unitary groups - MathOverflow most recent 30 from http://mathoverflow.net2013-05-21T09:48:01Zhttp://mathoverflow.net/feeds/question/116539http://www.creativecommons.org/licenses/by-nc/2.5/rdfhttp://mathoverflow.net/questions/116539/reference-request-injective-homomorphisms-between-unitary-groupsReference request: injective homomorphisms between unitary groupsPaul McKenney2012-12-16T18:01:55Z2012-12-16T18:01:55Z
<p>Let $U(n)$ be the group of unitary $n\times n$ matrices over $\mathbb{C}$. Is there a classification of the continuous, injective group homomorphisms $U(m)\to U(n)$? If so, is there a modern account of the proof?</p>