Perturbation of least squares problem in Hilbert spaces.
Let \(X\), \(Y\) be two Hilbert spaces and \(T: X\to Y\) be a bounded linear operator with closed range. The authors present some estimates related to the least squares solution for the equation \(Tx= y\). One of the main tools in their analysis is the reduced minimum modulus \(r(T)\).
scientific article; zbMATH DE number 1860887