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Decomposition of Semisimple Lie Algebras « The Unapologetic Mathematician
https://unapologetic.wordpress.com/2012/09/08/decomposition-of-semisimple-lie-algebras/
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lie algebras
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We say that a Lie algebra $latex L$ is the direct sum of a collection of ideals $latex L=I_1\oplus\dots\oplus I_n$ if it’s the direct sum as a vector space. In particular, this implies that $…
