skew-symmetric

listen to the pronunciation of skew-symmetric
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whose entries on one side of the diagonal are the additive inverses of their correspondents on the other side of the diagonal and the elements on the main diagonal are zero

\left(\begin{array}{ccc}0 & 2 & 3\\ -2 & 0 & -4\\ -3 & 4 & 0\end{array}\right).

skew symmetric matrix
In linear algebra, a skew-symmetric (or antisymmetric) matrix is a square matrix A whose transpose is also its negative
skew-symmetric
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