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Questions about the branch of algebra that deals with groups.

3 votes
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normal form of antisymmetric matrices under pseudo-orthogonal transformations

It is well-known that any real anti-symmetric $n \times n$ matrix $A$ can be transformed via $A \to O A O^T$ into block-diagonal form consisting of $2 \times 2$ antisymmetric matrices, where $O \in SO …
Harold Steinacker's user avatar