A note on the sensitivity of the solution of the weighted linear least squares problem.
The paper is an extension of the papers presented by \textit{J. Winkler} [Proceedings of the Fifth SIAM Conference on Applied Linear Algebra, SIAM, Philadelphia, 279--283 (1994; Zbl 0815.15004)] and by \textit{J.~Ji} and \textit{A. Lazari} [A note on the sensitivity of the solution of the linear least squares problem. Georgia J.~Sci. 56, 99--102 (1998)], where sharp lower and upper bounds of the sensitivity \(S(x,b) = \text{(relative error in }x\))
scientific article; zbMATH DE number 2008983