It’s the sort of easy maths problem that you can work out in a few minutes using pencil and paper, but physicists in China, Canada and Singapore have now solved pairs of linear equations like this one ...

Mathematics of Computation, Vol. 23, No. 108 (Oct., 1969), pp. 787-812 (26 pages) The mathematical and numerical least squares solution of a general linear system of equations is discussed.

We investigate the convergence properties of a class of iterative methods for operator equations with bounded linear operators in Banach spaces and Hilbert spaces. For operators in a Banach space, ...