cla_syrcond_c-f(3)

cla_syrcond_c.f –

Synopsis

Functions/Subroutines

REAL function cla_syrcond_c (UPLO, N, A, LDA, AF, LDAF, IPIV, C, CAPPLY, INFO, WORK, RWORK)
CLA_SYRCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for symmetric indefinite matrices.

Function/Subroutine Documentation

REAL function cla_syrcond_c (characterUPLO, integerN, complex, dimension( lda, * )A, integerLDA, complex, dimension( ldaf, * )AF, integerLDAF, integer, dimension( * )IPIV, real, dimension( * )C, logicalCAPPLY, integerINFO, complex, dimension( * )WORK, real, dimension( * )RWORK)

CLA_SYRCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for symmetric indefinite matrices.

Purpose:

 CLA_SYRCOND_C Computes the infinity norm condition number of
 op(A) * inv(diag(C)) where C is a REAL vector.

Parameters:

UPLO

 UPLO is CHARACTER*1
 = 'U': Upper triangle of A is stored;
 = 'L': Lower triangle of A is stored.

 N is INTEGER
 The number of linear equations, i.e., the order of the
 matrix A. N >= 0.

 A is COMPLEX 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 is COMPLEX array, dimension (LDAF,N)
 The block diagonal matrix D and the multipliers used to
 obtain the factor U or L as computed by CSYTRF.

LDAF

 LDAF is INTEGER
 The leading dimension of the array AF. LDAF >= max(1,N).

IPIV

 IPIV is INTEGER array, dimension (N)
 Details of the interchanges and the block structure of D
 as determined by CSYTRF.

 C is REAL array, dimension (N)
 The vector C in the formula op(A) * inv(diag(C)).

CAPPLY

 CAPPLY is LOGICAL
 If .TRUE. then access the vector C in the formula above.

INFO

 INFO is INTEGER
 = 0: Successful exit.
 i > 0: The ith argument is invalid.

WORK

 WORK is COMPLEX array, dimension (2*N).
 Workspace.

RWORK

 RWORK is REAL array, dimension (N).
 Workspace.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

September 2012

Definition at line 138 of file cla_syrcond_c.f.

Author

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