The choleski Q.I.F. algorithm for solving symmetric linear systems
David John Evans · International Journal of Computer Mathematics · 1999
Recently Evans [1] introduced a matrix factorisation method based on the product of quadrant interlocking factors (Q.I.F.) which can be denoted mnemonically as W and Z and are of ‘butterfly’ or bow-tie form. However when the given matrix is symmetric then the factorisation resolves into a more simpler formi.e., A = WW T and is presented in this short note.