Error Analysis of Direct Methods of Matrix Inversion
Journal of the ACM (JACM)
Chebyshev Solution of n+1 Linear Equations in n + 1nUnknowns
Journal of the ACM (JACM)
Iterative Refinement in Floating Point
Journal of the ACM (JACM)
Computational considerations regarding the calculation of Chebyshev solutions for overdetermined linear eqauation systems by the exchange method
Rounding Errors in Algebraic Processes
Rounding Errors in Algebraic Processes
Algorithm 414: Chebyshev approximation of continuous functions by a Chebyshev system of functions
Communications of the ACM
The simplex method of linear programming using LU decomposition
Communications of the ACM
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An implementation of Stiefel's exchange algorithm for determining a Chebyshev solution to an overdetermined system of linear equations is presented, that uses Gaussian LU decomposition with row interchanges. The implementation is computationally more stable than those usually given in the literature. A generalization of Stiefel's algorithm is developed which permits the occasional exchange of two equations simultaneously.