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Math Help - Lie algebras question

  1. #1
    MHF Contributor Swlabr's Avatar
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    Lie algebras question

    The problem:

    L a Lie algebra. Let H \lhd L and K \leq L. Then prove that H+K := \{ h+k : h \in H, k \in K\} is a subalgebra of L.

    Never mind - I was attempting to show it was an ideal, not a subalgebra. Is it possible to delete posts?
    Last edited by Swlabr; May 14th 2009 at 01:19 AM.
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