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The simplex method of linear programming using LU decomposition

Published: 01 May 1969 Publication History

Abstract

Standard computer implementations of Dantzig's simplex method for linear programming are based upon forming the inverse of the basic matrix and updating the inverse after every step of the method. These implementations have bad round-off error properties. This paper gives the theoretical background for an implementation which is based upon the LU decomposition, computed with row interchanges, of the basic matrix. The implementation is slow, but has good round-off error behavior. The implementation appears as CACM Algorithm 350.

References

[1]
BARTELS, R. H., AND GOLUB, G.H. Stable numerical methods for obtaining the Chebyshev solution to an overdetermined system of equations. Comm. ACM 11, 6 (June 1968), 401-406.
[2]
DANTZIG, G.B. Linear Programming and Extensions. Princeton U. Press, Princeton, N.J., 1963.
[3]
HADLEY, G. Linear Programming. Addison-Wesley, Reading, Mass., 1962.
[4]
WILKINSON, J. H. Rounding Errors in Algebraic Processes. Prentice-Hall Series in Automatic Computation, Englewood Cliffs, N.J., 1963.
[5]
BARTELS, RICHARD H. A numerical investigation of the simplex method. Tech. Rep. No. CS 104, Comput. Sci. Dep., Stanford U., Stanford, Calif., July 1968.

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cover image Communications of the ACM
Communications of the ACM  Volume 12, Issue 5
May 1969
95 pages
ISSN:0001-0782
EISSN:1557-7317
DOI:10.1145/362946
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 01 May 1969
Published in CACM Volume 12, Issue 5

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Author Tags

  1. LU decomposition
  2. computational stability
  3. linear programming
  4. round-off errors
  5. simplex method

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