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QR and permutation matrix
10-27-2015, 06:48 AM
Post: #5
RE: QR and permutation matrix
I see, it is probably like total pivoting vs partial pivoting. Partial pivoting is used in LU and QR, but in the LU case this adds a generically non trivial permutation matrix (PA=LU, P^-1*L would not be triangular) while in the QR case the permutation is absorbed by Q.
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Messages In This Thread
QR and permutation matrix - Han - 10-26-2015, 03:04 PM
RE: QR and permutation matrix - parisse - 10-26-2015, 05:04 PM
RE: QR and permutation matrix - Han - 10-26-2015, 07:24 PM
RE: QR and permutation matrix - Han - 10-26-2015, 05:16 PM
RE: QR and permutation matrix - parisse - 10-27-2015 06:48 AM



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