DOI QR코드

DOI QR Code

IMPROVING THE SOLVABILITY OF ILL-CONDITIONED SYSTEMS OF LINEAR EQUATIONS BY REDUCING THE CONDITION NUMBER OF THEIR MATRICES

  • Farooq, Muhammad (Department of Mathematical Sciences The University of Essex) ;
  • Salhi, Abdellah (Department of Mathematical Sciences The University of Essex)
  • Received : 2010.02.03
  • Published : 2011.09.01

Abstract

This paper is concerned with the solution of ill-conditioned Systems of Linear Equations (SLE's) via the solution of equivalent SLE's which are well-conditioned. A matrix is rst constructed from that of the given ill-conditioned system. Then, an adequate right-hand side is computed to make up the instance of an equivalent system. Formulae and algorithms for computing an instance of this equivalent SLE and solving it will be given and illustrated.

Keywords

References

  1. C. Brezinski, Other manifestations of the schur complement, Linear Algebra Appl. 111 (1988), 231-247. https://doi.org/10.1016/0024-3795(88)90062-6
  2. C. Brezinski, M. Redivo Zaglia, and H. Sadok, A Breakdown-free Lanczos type algorithm for solving linear systems, Numer. Math. 63 (1992), no. 1, 29-38. https://doi.org/10.1007/BF01385846
  3. V. N. Faddeeva, Computational Methods of Linear Algebra, Dover Publications, Inc., New York, USA, 1959.
  4. H. J. Kim, Kyung Choi, H. B. Lee, H. K. Jung, and S. Y. Hahn, A new algorithm for solving ill-conditioned linear system, IEEE Transactions on Magnetics 32 (1996), no. 3, 1373-1376. https://doi.org/10.1109/20.497502
  5. J. R. Rice, Matrix Computations and Mathematical Software, McGraw-Hill, New York, 1981.
  6. F. Zhang and Roger A. Horn, Basic Properties of the Schur Complement, In F. Zhang, editor, The Schur Complement and its applications, pages 17-46. Springer, New York, 2005.

Cited by

  1. Reference satellite selection method for GNSS high-precision relative positioning vol.8, pp.2, 2017, https://doi.org/10.1016/j.geog.2016.07.007
  2. A two-step monolithic method for the efficient simulation of incompressible flows vol.74, pp.12, 2014, https://doi.org/10.1002/fld.3881
  3. Application of high-order Levenberg–Marquardt method for solving the power flow problem in the ill-conditioned systems vol.10, pp.12, 2016, https://doi.org/10.1049/iet-gtd.2016.0064