2 problems

Let $A_{mp}=Q_{mp}R_{pp}$ be a full QR factorisation, with $Q_{mp}$ orthogonal and $\begin{pmatrix}R_{nn}\\0_{pn}\end{pmatrix}$ the corresponding block structure, and write the der…

Let $m$ and $n$ be positive integers, and let $L$ be the number of levels in a TSQR factorization of an $m$-by-$n$ matrix. Compare TSQR with Householder QR (HQR) in uniform precisi…