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Lie Groups are Groups that are additionally smooth manifolds such that the multiplication and the inverse maps are smooth.

15 votes
3 answers
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Group of matrices in which every matrix is similar to unitary

$\DeclareMathOperator\GL{GL}$Let $G$ be a subgroup of $\GL_n(\mathbb{C})$ such that for every $g \in G$ there exists $c \in \GL_n(\mathbb{C})$ for which $cgc^{-1}$ is unitary (or, which is the same, $ …
Александр Худяков's user avatar