Ortogonal matrix
I matrixteori er en reel ortogonal matrix (eller en reel ortogonalmatrix) en kvadratisk matrix Q hvis transponerede er dens inverse:
I matrixteori er en reel ortogonal matrix (eller en reel ortogonalmatrix) en kvadratisk matrix Q hvis transponerede er dens inverse:
Det kan ses, at en ortogonalmatrix har determinant 1 eller − 1, og en ortogonal matrix med determinant 1 kaldes en speciel ortogonal matrix.
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