Round-off analysis of the wz matrix factorisation method^*

^*Supported by EEG grant PECO No.CIP A3510CT920768

Abstract

A round-off error analysis of the parallel WZ matrix factorisation is presented. Some pivoting techniques for a modification of this factorisationare considered. Finally, diagonally dominant matrices are studied separately in order to attain improved results.

Keywords:

• Error analysis
• WZ factorisation
• equivalent perturbations

C.R Categories:

• G.1.3

^*Supported by EEG grant PECO No.CIP A3510CT920768

^†Technical University of Russe, Bulgaria. This author was also partially supported by Grant MM-211/92 from the Bulgarian Ministry of Edugation and Science.

^*Supported by EEG grant PECO No.CIP A3510CT920768

^†Technical University of Russe, Bulgaria. This author was also partially supported by Grant MM-211/92 from the Bulgarian Ministry of Edugation and Science.

Notes

^*Supported by EEG grant PECO No.CIP A3510CT920768

^†Technical University of Russe, Bulgaria. This author was also partially supported by Grant MM-211/92 from the Bulgarian Ministry of Edugation and Science.

Additional information

Notes on contributors

P. Yalamov

1 †