CLA_GERCOND_X
Purpose
CLA_GERCOND_X computes the infinity norm condition number of
op(A) * diag(X) where X is a COMPLEX vector.
op(A) * diag(X) where X is a COMPLEX vector.
Arguments
| TRANS |
(input) 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 |
(input) INTEGER
The number of linear equations, i.e., the order of the
matrix A. N >= 0. |
| A |
(input) COMPLEX array, dimension (LDA,N)
On entry, the N-by-N matrix A.
|
| LDA |
(input) INTEGER
The leading dimension of the array A. LDA >= max(1,N).
|
| AF |
(input) COMPLEX array, dimension (LDAF,N)
The factors L and U from the factorization
|
| A |
= P*L*U as computed by CGETRF.
|
| LDAF |
(input) INTEGER
The leading dimension of the array AF. LDAF >= max(1,N).
|
| IPIV |
(input) 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). |
| X |
(input) COMPLEX array, dimension (N)
The vector X in the formula op(A) * diag(X).
|
| INFO |
(output) INTEGER
= 0: Successful exit.
i > 0: The ith argument is invalid. |
| WORK |
(input) COMPLEX array, dimension (2*N).
Workspace.
|
| RWORK |
(input) REAL array, dimension (N).
Workspace.
|