subroutine cgesc2 (N, A, LDA, RHS, IPIV, JPIV, SCALE)
CGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.
CGESC2 solves a system of linear equations using the LU factorization with complete pivoting computed by sgetc2.
Purpose:
CGESC2 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 CGETC2.
Parameters:
N is INTEGER The number of columns of the matrix A.
A
A is COMPLEX array, dimension (LDA, N) On entry, the LU part of the factorization of the n-by-n matrix A computed by CGETC2: A = P * L * U * Q
LDA
LDA is INTEGER The leading dimension of the array A. LDA >= max(1, N).
RHS
RHS is COMPLEX 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 REAL On exit, SCALE contains the scale factor. SCALE is chosen 0 <= SCALE <= 1 to prevent owerflow in the solution.
Author:
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
Contributors:
Definition at line 117 of file cgesc2.f.
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