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zla_gercond_x.f(3) LAPACK zla_gercond_x.f(3)

NAME

zla_gercond_x.f -

SYNOPSIS

Functions/Subroutines


double precision function zla_gercond_x (TRANS, N, A, LDA, AF, LDAF, IPIV, X, INFO, WORK, RWORK)
 
ZLA_GERCOND_X computes the infinity norm condition number of op(A)*diag(x) for general matrices.

Function/Subroutine Documentation

double precision function zla_gercond_x (characterTRANS, integerN, complex*16, dimension( lda, * )A, integerLDA, complex*16, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, complex*16, dimension( * )X, integerINFO, complex*16, dimension( * )WORK, double precision, dimension( * )RWORK)

ZLA_GERCOND_X computes the infinity norm condition number of op(A)*diag(x) for general matrices.
Purpose: 
    ZLA_GERCOND_X computes the infinity norm condition number of
    op(A) * diag(X) where X is a COMPLEX*16 vector.
Parameters:
TRANS 
          TRANS is CHARACTER*1
     Specifies the form of the system of equations:
       = 'N':  A * X = B     (No transpose)
       = 'T':  A**T * X = B  (Transpose)
       = 'C':  A**H * X = B  (Conjugate Transpose = Transpose)
N 
          N is INTEGER
     The number of linear equations, i.e., the order of the
     matrix A.  N >= 0.
A 
          A is COMPLEX*16 array, dimension (LDA,N)
     On entry, the N-by-N matrix A.
LDA 
          LDA is INTEGER
     The leading dimension of the array A.  LDA >= max(1,N).
AF 
          AF is COMPLEX*16 array, dimension (LDAF,N)
     The factors L and U from the factorization
     A = P*L*U as computed by ZGETRF.
LDAF 
          LDAF is INTEGER
     The leading dimension of the array AF.  LDAF >= max(1,N).
IPIV 
          IPIV is INTEGER array, dimension (N)
     The pivot indices from the factorization A = P*L*U
     as computed by ZGETRF; row i of the matrix was interchanged
     with row IPIV(i).
X 
          X is COMPLEX*16 array, dimension (N)
     The vector X in the formula op(A) * diag(X).
INFO 
          INFO is INTEGER
       = 0:  Successful exit.
     i > 0:  The ith argument is invalid.
WORK 
          WORK is COMPLEX*16 array, dimension (2*N).
     Workspace.
RWORK 
          RWORK is DOUBLE PRECISION array, dimension (N).
     Workspace.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 135 of file zla_gercond_x.f.

Author

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