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zgesc2.f(3) LAPACK zgesc2.f(3)

zgesc2.f -


subroutine zgesc2 (N, A, LDA, RHS, IPIV, JPIV, SCALE)
 
ZGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.

ZGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.
Purpose:
 ZGESC2 solves a system of linear equations
A * X = scale* RHS
with a general N-by-N matrix A using the LU factorization with complete pivoting computed by ZGETC2.
Parameters:
N
          N is INTEGER
          The number of columns of the matrix A.
A
          A is COMPLEX*16 array, dimension (LDA, N)
          On entry, the  LU part of the factorization of the n-by-n
          matrix A computed by ZGETC2:  A = P * L * U * Q
LDA
          LDA is INTEGER
          The leading dimension of the array A.  LDA >= max(1, N).
RHS
          RHS is COMPLEX*16 array, dimension N.
          On entry, the right hand side vector b.
          On exit, the solution vector X.
IPIV
          IPIV is INTEGER array, dimension (N).
          The pivot indices; for 1 <= i <= N, row i of the
          matrix has been interchanged with row IPIV(i).
JPIV
          JPIV is INTEGER array, dimension (N).
          The pivot indices; for 1 <= j <= N, column j of the
          matrix has been interchanged with column JPIV(j).
SCALE
          SCALE is DOUBLE PRECISION
           On exit, SCALE contains the scale factor. SCALE is chosen
           0 <= SCALE <= 1 to prevent owerflow in the solution.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Contributors:
Bo Kagstrom and Peter Poromaa, Department of Computing Science, Umea University, S-901 87 Umea, Sweden.
Definition at line 116 of file zgesc2.f.

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Sat Nov 16 2013 Version 3.4.2

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