We can combine these three matrices into a single linear system, where the first matrix multiplied by the unknown values of the second matrix equals the third matrix — at which point we can use linear ...

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 also completely characterize the set of solutions for n = 2 using commutative algebraic techniques. The journal publishes original papers in all areas of pure and applied mathematics. Consists of ...