Visible to Intel only — GUID: GUID-6C6190ED-D120-4141-8DC8-60C2241C885E
Visible to Intel only — GUID: GUID-6C6190ED-D120-4141-8DC8-60C2241C885E
?la_hercond_x
Computes the infinity norm condition number of op(A)*diag(x) for Hermitian indefinite matrices.
Syntax
call cla_hercond_x( uplo, n, a, lda, af, ldaf, ipiv, x, info, work, rwork )
call zla_hercond_x( uplo, n, a, lda, af, ldaf, ipiv, x, info, work, rwork )
Include Files
- mkl.fi
Description
The function computes the infinity norm condition number of
op(A) * diag(x)
where the x is a COMPLEX vector for cla_hercond_x and a DOUBLE COMPLEX vector for zla_hercond_x.
Input Parameters
- uplo
-
CHARACTER*1. Must be 'U' or 'L'.
Specifies the triangle of A to store:
If uplo = 'U', the upper triangle of A is stored,
If uplo = 'L', the lower triangle of A is stored.
- n
-
INTEGER. The number of linear equations, that is, the order of the matrix A; n≥ 0.
- a
-
COMPLEX for cla_hercond_c
DOUBLE COMPLEX for zla_hercond_c
Array, DIMENSION(lda, *). On entry, the n-by-n matrix A. The second dimension of a must be at least max(1,n).
- lda
-
INTEGER. The leading dimension of the array a. lda≥max(1,n).
- af
-
COMPLEX for cla_hercond_c
DOUBLE COMPLEX for zla_hercond_c
Array, DIMENSION(ldaf, *). The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ?hetrf. The second dimension of af must be at least max(1,n).
- ldaf
-
INTEGER. The leading dimension of the array af. ldaf≥max(1,n).
- ipiv
-
INTEGER.
Array with DIMENSIONn. Details of the interchanges and the block structure of D as determined by ?hetrf.
- x
-
COMPLEX for cla_hercond_c
DOUBLE COMPLEX for zla_hercond_c
Array x with DIMENSIONn. The vector x in the formula
op(A) * inv(diag(x)).
- work
-
COMPLEX for cla_hercond_c
DOUBLE COMPLEX for zla_hercond_c
Array DIMENSION 2*n. Workspace.
- rwork
-
REAL for cla_hercond_c
DOUBLE PRECISION for zla_hercond_c
Array DIMENSIONn. Workspace.
Output Parameters
- info
-
INTEGER.
If info = 0, the execution is successful.
If i > 0, the i-th parameter is invalid.