when does the transpose of a matrix equal the inverse
Orthogonal matrix This leads to the equivalent characterization: a matrix Q is orthogonal if its transpose is equal to its inverse:
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Hermitian matrix The diagonal elements must be real, as they must be their own complex conjugate.
1 + 2 + 3 + 4 + ⋯ which increases without bound as n goes to infinity. Because the sequence of partial sums fails to converge to a finite limit, the series does not have a sum.