Mathematics – Numerical Analysis
Scientific paper
2006-03-10
Applied Mathematics and Computation, 182 (1), 1 November 2006, 727-738
Mathematics
Numerical Analysis
Scientific paper
10.1016/j.amc.2006.04.032
We present a practical and efficient means to compute the singular value decomposition (svd) of a quaternion matrix A based on bidiagonalization of A to a real bidiagonal matrix B using quaternionic Householder transformations. Computation of the svd of B using an existing subroutine library such as lapack provides the singular values of A. The singular vectors of A are obtained trivially from the product of the Householder transformations and the real singular vectors of B. We show in the paper that left and right quaternionic Householder transformations are different because of the noncommutative multiplication of quaternions and we present formulae for computing the Householder vector and matrix in each case.
Bihan Nicolas Le
Sangwine Stephen J.
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