Implementation of QR up- and downdating on a massively parallel computer

Björck, 1994, Accurate downdating of least squares solutions, SIAM J. Matrix Anal. Appl., 15, 549, 10.1137/S089547989222895X Demmel, 1993, Parallel numerical linear algebra, Acta Numerica, 111, 10.1017/S096249290000235X Dongarra, 1991 Dongarra, 1979 Golub, 1989 Lichtenstein, 1993, Block cyclic dense linear algebra, SIAM J. Sci. Comp., 14, 1259, 10.1137/0914075 K. Madsen, H.B. Nielsen and M.C. Pinar, A new finite continuation algorithm for linear programming, Report NI-93-07, Institute for Numerical Analysis, Technical University of Denmark; submitted to SIAM J. Optim. K. Madsen, H.B. Nielsen, M.C. Pinar, C. Bendtsen and P.C. Hansen, Solving bounded variable linear problems on the connection machine CM-200, Report NI-93-08, Institute for Numerical Analysis, Techinical University of Denmark, submitted to ORSA J. on Comput. Paige, 1980, Error analysis of some techniques for updating orthogonal decompositions, Math. Comp., 34, 465, 10.1090/S0025-5718-1980-0559196-9 Thinking Machines Corporation, 1992 Thinking Machines Corporation, CM-200 Technical Summary.