Talk:Schur's lemma

Is the Schur lemma mentioned on Simple module the same as the one here? MarSch 16:45, 7 Apr 2005 (UTC)

The simple answer is 'yes'. Charles Matthews 17:39, 7 Apr 2005 (UTC)

In differential geometry, Schur's Lemma usually refers to the result that if the sectional curvature of a Riemannian manifold does not depend on the choice of 2-plane in any tangent space, then it also does not depend on the point in the manifold, i.e., the manifold has constant curvature. Shouldn't this be added here? 128.138.64.92 21:13, 10 April 2007 (UTC)

Matrix form

Given a matrix representation does the following hold or not? (ir)reducible matrix <=> (ir)reducible representation

Where can I find a (concise?) proof of schur's lemma in matrix form? — Preceding unsigned comment added by 157.193.2.37 (talk) 00:07, 15 August 2011 (UTC)