When is a matrix A skew-symmetric?
- A = Aᵀ
- A = –Aᵀ
- A + Aᵀ = I
- None of these
Explanation
A square matrix, A , is skew-symmetric if it is equal to the negation of its nonconjugate transpose, A = -A. ' . a i , j = − a j , i . is both skew-symmetric and skew-Hermitian.
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