- #1
Vikt0r
- 1
- 0
Hi
I am arguing with a friend about the following:
He claims that if a mxn matrix A, m>=n has a reduced QR-decomposition where R has j nonzero diagonal elements, then the rank of A is at least j. I claim that it is exactly j.
It was some years ago since i read linear algebra so i was hoping someone here could help us out.
I am arguing with a friend about the following:
He claims that if a mxn matrix A, m>=n has a reduced QR-decomposition where R has j nonzero diagonal elements, then the rank of A is at least j. I claim that it is exactly j.
It was some years ago since i read linear algebra so i was hoping someone here could help us out.