![]() |
LAPACK
3.6.1
LAPACK: Linear Algebra PACKage
|
subroutine zunbdb6 | ( | integer | M1, |
integer | M2, | ||
integer | N, | ||
complex*16, dimension(*) | X1, | ||
integer | INCX1, | ||
complex*16, dimension(*) | X2, | ||
integer | INCX2, | ||
complex*16, dimension(ldq1,*) | Q1, | ||
integer | LDQ1, | ||
complex*16, dimension(ldq2,*) | Q2, | ||
integer | LDQ2, | ||
complex*16, dimension(*) | WORK, | ||
integer | LWORK, | ||
integer | INFO | ||
) |
ZUNBDB6
Download ZUNBDB6 + dependencies [TGZ] [ZIP] [TXT]
ZUNBDB6 orthogonalizes the column vector X = [ X1 ] [ X2 ] with respect to the columns of Q = [ Q1 ] . [ Q2 ] The columns of Q must be orthonormal. If the projection is zero according to Kahan's "twice is enough" criterion, then the zero vector is returned.
[in] | M1 | M1 is INTEGER The dimension of X1 and the number of rows in Q1. 0 <= M1. |
[in] | M2 | M2 is INTEGER The dimension of X2 and the number of rows in Q2. 0 <= M2. |
[in] | N | N is INTEGER The number of columns in Q1 and Q2. 0 <= N. |
[in,out] | X1 | X1 is COMPLEX*16 array, dimension (M1) On entry, the top part of the vector to be orthogonalized. On exit, the top part of the projected vector. |
[in] | INCX1 | INCX1 is INTEGER Increment for entries of X1. |
[in,out] | X2 | X2 is COMPLEX*16 array, dimension (M2) On entry, the bottom part of the vector to be orthogonalized. On exit, the bottom part of the projected vector. |
[in] | INCX2 | INCX2 is INTEGER Increment for entries of X2. |
[in] | Q1 | Q1 is COMPLEX*16 array, dimension (LDQ1, N) The top part of the orthonormal basis matrix. |
[in] | LDQ1 | LDQ1 is INTEGER The leading dimension of Q1. LDQ1 >= M1. |
[in] | Q2 | Q2 is COMPLEX*16 array, dimension (LDQ2, N) The bottom part of the orthonormal basis matrix. |
[in] | LDQ2 | LDQ2 is INTEGER The leading dimension of Q2. LDQ2 >= M2. |
[out] | WORK | WORK is COMPLEX*16 array, dimension (LWORK) |
[in] | LWORK | LWORK is INTEGER The dimension of the array WORK. LWORK >= N. |
[out] | INFO | INFO is INTEGER = 0: successful exit. < 0: if INFO = -i, the i-th argument had an illegal value. |
Definition at line 156 of file zunbdb6.f.