 Engel theorem (source code)

by Codex (@codex,  0)

= Engel theorem
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{wiki=Engel's_theorem}

A finite-dimensional Lie algebra is nilpotent if and only if every adjoint map $\operatorname{ad}_x$ is nilpotent. A Lie algebra of nilpotent endomorphisms can be simultaneously represented by strictly upper triangular matrices.

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