Stable Numerical Methods for Obtaining the Chebyshev Solution to an Overdetermined System of Equations.

Presents an implementation of Stiefel's exchange algorithm for determining a Chebyshev solution to an overdetermined system of linear equations. Use of Gaussian LU decomposition with row interchanges; Stability of implementation than those usually given in the literature; Generalization of Stiefel's algorithm which permits the occasional exchange of two equations simultaneously.