Hi I have a generic matrix A, is it possible to bound the error defined as $|(A^+ A) - I|$ ?? Are there some reasonable assumptions (es. random matrix, etc...) I can make in ord …

Suppose that we are given an equation $Ax=b$. The minimum least-squares solution is of course $x_{m}=A^{\dagger}b$. What I want to know is whether there are known bounds on $||x-x_ …