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  2. QR decomposition - Wikipedia

    en.wikipedia.org/wiki/QR_decomposition

    The QR decomposition via Givens rotations is the most involved to implement, as the ordering of the rows required to fully exploit the algorithm is not trivial to determine. However, it has a significant advantage in that each new zero element a i j {\displaystyle a_{ij}} affects only the row with the element to be zeroed ( i ) and a row above ...

  3. QR algorithm - Wikipedia

    en.wikipedia.org/wiki/QR_algorithm

    Instead, the QR algorithm works with a complete basis of vectors, using QR decomposition to renormalize (and orthogonalize). For a symmetric matrix A , upon convergence, AQ = QΛ , where Λ is the diagonal matrix of eigenvalues to which A converged, and where Q is a composite of all the orthogonal similarity transforms required to get there.

  4. RRQR factorization - Wikipedia

    en.wikipedia.org/wiki/RRQR_factorization

    An RRQR factorization or rank-revealing QR factorization is a matrix decomposition algorithm based on the QR factorization which can be used to determine the rank of a matrix. [1] The singular value decomposition can be used to generate an RRQR, but it is not an efficient method to do so. [2] An RRQR implementation is available in MATLAB. [3]

  5. Template:QR code/doc - Wikipedia

    en.wikipedia.org/wiki/Template:QR_code/doc

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  6. File:QR Code Structure Example 2.svg - Wikipedia

    en.wikipedia.org/wiki/File:QR_Code_Structure...

    Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

  7. Iwasawa decomposition - Wikipedia

    en.wikipedia.org/wiki/Iwasawa_decomposition

    In mathematics, the Iwasawa decomposition (aka KAN from its expression) of a semisimple Lie group generalises the way a square real matrix can be written as a product of an orthogonal matrix and an upper triangular matrix (QR decomposition, a consequence of Gram–Schmidt orthogonalization).