cla_gercond_c()

real function cla_gercond_c	(	character	trans,
		integer	n,
		complex, dimension( lda, * )	a,
		integer	lda,
		complex, dimension( ldaf, * )	af,
		integer	ldaf,
		integer, dimension( * )	ipiv,
		real, dimension( * )	c,
		logical	capply,
		integer	info,
		complex, dimension( * )	work,
		real, dimension( * )	rwork )

CLA_GERCOND_C computes the infinity norm condition number of op(A)*inv(diag(c)) for general matrices.

Download CLA_GERCOND_C + dependencies [TGZ] [ZIP] [TXT]

Purpose:

!>
!>
!>    CLA_GERCOND_C computes the infinity norm condition number of
!>    op(A) * inv(diag(C)) where C is a REAL vector.
!> 

Parameters

[in]	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) !>
[in]	N	!> N is INTEGER !> The number of linear equations, i.e., the order of the !> matrix A. N >= 0. !>
[in]	A	!> A is COMPLEX array, dimension (LDA,N) !> On entry, the N-by-N matrix A !>
[in]	LDA	!> LDA is INTEGER !> The leading dimension of the array A. LDA >= max(1,N). !>
[in]	AF	!> AF is COMPLEX array, dimension (LDAF,N) !> The factors L and U from the factorization !> A = P*L*U as computed by CGETRF. !>
[in]	LDAF	!> LDAF is INTEGER !> The leading dimension of the array AF. LDAF >= max(1,N). !>
[in]	IPIV	!> IPIV is INTEGER array, dimension (N) !> The pivot indices from the factorization A = P*L*U !> as computed by CGETRF; row i of the matrix was interchanged !> with row IPIV(i). !>
[in]	C	!> C is REAL array, dimension (N) !> The vector C in the formula op(A) * inv(diag(C)). !>
[in]	CAPPLY	!> CAPPLY is LOGICAL !> If .TRUE. then access the vector C in the formula above. !>
[out]	INFO	!> INFO is INTEGER !> = 0: Successful exit. !> i > 0: The ith argument is invalid. !>
[out]	WORK	!> WORK is COMPLEX array, dimension (2*N). !> Workspace. !>
[out]	RWORK	!> RWORK is REAL array, dimension (N). !> Workspace. !>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.