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A Remark on the Proof of a Theorem of Laufer and Tomber
Published online by Cambridge University Press: 20 November 2018
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In this note we give a correction to the proof of the following theorem [1, Theorem 2].
THEOREM. Letbe a flexible, power-associative algebra, over an arbitrary algebraically closed field Ω of characteristic 0. Ifis a simple Lie algebra, thenis a simple Lie algebra isomorphic to.
Step (i) of the proof, which proves that the Cartan subalgebra of is a nil subalgebra of , is incomplete. Assuming that is not a nil subalgebra of , there exists an idempotent e ≠ 0 in .
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