Skew-Hermitian matrix
= Skew-Hermitian matrix
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= Skew-Hermitian
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= Anti-Hermitian matrix
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= Anti-Hermitian
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A complex matrix $A$ is skew-Hermitian when $A^\dagger=-A$. Its <matrix exponential> $e^{tA}$ is <unitary matrix>[unitary] for every real $t$.