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cgesc2.f(3) LAPACK cgesc2.f(3)

NAME

cgesc2.f -

SYNOPSIS

Functions/Subroutines


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.

Function/Subroutine Documentation

subroutine cgesc2 (integerN, complex, dimension( lda, * )A, integerLDA, complex, dimension( * )RHS, integer, dimension( * )IPIV, integer, dimension( * )JPIV, realSCALE)

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
          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 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 cgesc2.f.

Author

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