Sign up ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

How does the upper triangular matrix $R$ of a QR decomposition change when you swap the columns of the original matrix? I've tried multiplying both sides of $A = Q R$ by a permutation matrix $P$, but $R P$ isn't an upper triangular matrix anymore. I'm probably missing a simple relationship somewhere.

share|cite|improve this question

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.