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LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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| recursive subroutine claqz2 | ( | logical, intent(in) | ILSCHUR, |
| logical, intent(in) | ILQ, | ||
| logical, intent(in) | ILZ, | ||
| integer, intent(in) | N, | ||
| integer, intent(in) | ILO, | ||
| integer, intent(in) | IHI, | ||
| integer, intent(in) | NW, | ||
| complex, dimension( lda, * ), intent(inout) | A, | ||
| integer, intent(in) | LDA, | ||
| complex, dimension( ldb, * ), intent(inout) | B, | ||
| integer, intent(in) | LDB, | ||
| complex, dimension( ldq, * ), intent(inout) | Q, | ||
| integer, intent(in) | LDQ, | ||
| complex, dimension( ldz, * ), intent(inout) | Z, | ||
| integer, intent(in) | LDZ, | ||
| integer, intent(out) | NS, | ||
| integer, intent(out) | ND, | ||
| complex, dimension( * ), intent(inout) | ALPHA, | ||
| complex, dimension( * ), intent(inout) | BETA, | ||
| complex, dimension( ldqc, * ) | QC, | ||
| integer, intent(in) | LDQC, | ||
| complex, dimension( ldzc, * ) | ZC, | ||
| integer, intent(in) | LDZC, | ||
| complex, dimension( * ) | WORK, | ||
| integer, intent(in) | LWORK, | ||
| real, dimension( * ) | RWORK, | ||
| integer, intent(in) | REC, | ||
| integer, intent(out) | INFO | ||
| ) |
CLAQZ2
Download CLAQZ2 + dependencies [TGZ] [ZIP] [TXT]
CLAQZ2 performs AED
| [in] | ILSCHUR | ILSCHUR is LOGICAL
Determines whether or not to update the full Schur form |
| [in] | ILQ | ILQ is LOGICAL
Determines whether or not to update the matrix Q |
| [in] | ILZ | ILZ is LOGICAL
Determines whether or not to update the matrix Z |
| [in] | N | N is INTEGER
The order of the matrices A, B, Q, and Z. N >= 0. |
| [in] | ILO | ILO is INTEGER |
| [in] | IHI | IHI is INTEGER
ILO and IHI mark the rows and columns of (A,B) which
are to be normalized |
| [in] | NW | NW is INTEGER
The desired size of the deflation window. |
| [in,out] | A | A is COMPLEX array, dimension (LDA, N) |
| [in] | LDA | LDA is INTEGER
The leading dimension of the array A. LDA >= max( 1, N ). |
| [in,out] | B | B is COMPLEX array, dimension (LDB, N) |
| [in] | LDB | LDB is INTEGER
The leading dimension of the array B. LDB >= max( 1, N ). |
| [in,out] | Q | Q is COMPLEX array, dimension (LDQ, N) |
| [in] | LDQ | LDQ is INTEGER |
| [in,out] | Z | Z is COMPLEX array, dimension (LDZ, N) |
| [in] | LDZ | LDZ is INTEGER |
| [out] | NS | NS is INTEGER
The number of unconverged eigenvalues available to
use as shifts. |
| [out] | ND | ND is INTEGER
The number of converged eigenvalues found. |
| [out] | ALPHA | ALPHA is COMPLEX array, dimension (N)
Each scalar alpha defining an eigenvalue
of GNEP. |
| [out] | BETA | BETA is COMPLEX array, dimension (N)
The scalars beta that define the eigenvalues of GNEP.
Together, the quantities alpha = ALPHA(j) and
beta = BETA(j) represent the j-th eigenvalue of the matrix
pair (A,B), in one of the forms lambda = alpha/beta or
mu = beta/alpha. Since either lambda or mu may overflow,
they should not, in general, be computed. |
| [in,out] | QC | QC is COMPLEX array, dimension (LDQC, NW) |
| [in] | LDQC | LDQC is INTEGER |
| [in,out] | ZC | ZC is COMPLEX array, dimension (LDZC, NW) |
| [in] | LDZC | LDZ is INTEGER |
| [out] | WORK | WORK is COMPLEX array, dimension (MAX(1,LWORK))
On exit, if INFO >= 0, WORK(1) returns the optimal LWORK. |
| [in] | LWORK | LWORK is INTEGER
The dimension of the array WORK. LWORK >= max(1,N).
If LWORK = -1, then a workspace query is assumed; the routine
only calculates the optimal size of the WORK array, returns
this value as the first entry of the WORK array, and no error
message related to LWORK is issued by XERBLA. |
| [out] | RWORK | RWORK is REAL array, dimension (N) |
| [in] | REC | REC is INTEGER
REC indicates the current recursion level. Should be set
to 0 on first call.
\param[out] INFO
\verbatim
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value |
1.9.4