NAME¶
ZGERC - perform the rank 1 operation A := alpha*x*conjg( y' ) + A,
SYNOPSIS¶
- SUBROUTINE ZGERC
- ( M, N, ALPHA, X, INCX, Y, INCY, A, LDA )
COMPLEX*16 ALPHA INTEGER INCX, INCY, LDA, M, N COMPLEX*16 A( LDA, * ), X( * ),
Y( * )
PURPOSE¶
ZGERC performs the rank 1 operation
where alpha is a scalar, x is an m element vector, y is an n element vector and
A is an m by n matrix.
PARAMETERS¶
- M - INTEGER.
- On entry, M specifies the number of rows of the matrix A. M must be at
least zero. Unchanged on exit.
- N - INTEGER.
- On entry, N specifies the number of columns of the matrix A. N must be at
least zero. Unchanged on exit.
- ALPHA - COMPLEX*16 .
- On entry, ALPHA specifies the scalar alpha. Unchanged on exit.
- X - COMPLEX*16 array of dimension at least
- ( 1 + ( m - 1 )*abs( INCX ) ). Before entry, the incremented array X must
contain the m element vector x. Unchanged on exit.
- INCX - INTEGER.
- On entry, INCX specifies the increment for the elements of X. INCX must
not be zero. Unchanged on exit.
- Y - COMPLEX*16 array of dimension at least
- ( 1 + ( n - 1 )*abs( INCY ) ). Before entry, the incremented array Y must
contain the n element vector y. Unchanged on exit.
- INCY - INTEGER.
- On entry, INCY specifies the increment for the elements of Y. INCY must
not be zero. Unchanged on exit.
- A - COMPLEX*16 array of DIMENSION ( LDA, n ).
- Before entry, the leading m by n part of the array A must contain the
matrix of coefficients. On exit, A is overwritten by the updated
matrix.
- LDA - INTEGER.
- On entry, LDA specifies the first dimension of A as declared in the
calling (sub) program. LDA must be at least max( 1, m ). Unchanged on
exit.
Level 2 Blas routine.
-- Written on 22-October-1986. Jack Dongarra, Argonne National Lab. Jeremy
Du Croz, Nag Central Office. Sven Hammarling, Nag Central Office. Richard
Hanson, Sandia National Labs.