http://alanrendall.wordpress.com/2010/01/01/four-dimensional-lie-algebras/ A mathematician thinks aloud Thu, 09 May 2013 07:10:22 +0000 hourly 1 http://wordpress.com/ http://alanrendall.wordpress.com/2010/01/01/four-dimensional-lie-algebras/#comment-326 Wed, 10 Feb 2010 06:26:25 +0000 http://alanrendall.wordpress.com/?p=774#comment-326 The preprint mentioned in the post is now available as http://arxiv.org/abs/1002.1851.

]]> http://alanrendall.wordpress.com/2010/01/01/four-dimensional-lie-algebras/#comment-301 Thu, 14 Jan 2010 08:12:57 +0000 http://alanrendall.wordpress.com/?p=774#comment-301 I now realized that my picture of the unimodular four-dimensional Lie algebras was flawed and I want to correct this here. In fact not all the indecomposable four-dimensional Lie algebras have a three-dimensional Abelian subalgebra as claimed in the post. There are two exceptions which are those denoted by and in the paper of Hervik. At the moment I have no good geometrical picture of those two.

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