Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages

RedHat 9 (Linux i386) - man page for zhemv (redhat section l)

ZHEMV(l)				   BLAS routine 				 ZHEMV(l)

NAME
       ZHEMV - perform the matrix-vector operation   y := alpha*A*x + beta*y,

SYNOPSIS
       SUBROUTINE ZHEMV ( UPLO, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY )

	   COMPLEX*16	ALPHA, BETA

	   INTEGER	INCX, INCY, LDA, N

	   CHARACTER*1	UPLO

	   COMPLEX*16	A( LDA, * ), X( * ), Y( * )

PURPOSE
       ZHEMV  performs the matrix-vector  operation

       where alpha and beta are scalars, x and y are n element vectors and A is an n by n hermit-
       ian matrix.

PARAMETERS
       UPLO   - CHARACTER*1.
	      On entry, UPLO specifies whether the upper or lower triangular part of the array	A
	      is to be referenced as follows:

	      UPLO = 'U' or 'u'   Only the upper triangular part of A is to be referenced.

	      UPLO = 'L' or 'l'   Only the lower triangular part of A is to be referenced.

	      Unchanged on exit.

       N      - INTEGER.
	      On  entry,  N  specifies	the  order  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.

       A      - COMPLEX*16	 array of DIMENSION ( LDA, n ).
	      Before entry with  UPLO = 'U' or 'u', the leading n by n upper triangular  part  of
	      the  array A must contain the upper triangular part of the hermitian matrix and the
	      strictly lower triangular part of A is not referenced.  Before entry  with  UPLO	=
	      'L'  or  'l',  the leading n by n lower triangular part of the array A must contain
	      the lower triangular part of the hermitian matrix and the strictly upper triangular
	      part  of	A  is not referenced.  Note that the imaginary parts of the diagonal ele-
	      ments need not be set and are assumed to be zero.  Unchanged on exit.

       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, n ).  Unchanged on exit.

       X      - COMPLEX*16	 array of dimension at least
	      (  1 + ( n - 1 )*abs( INCX ) ).  Before entry, the incremented array X must contain
	      the n 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.

       BETA   - COMPLEX*16	.
	      On entry, BETA specifies the scalar beta. When BETA is supplied as zero then Y need
	      not be set on input.  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. On exit, Y is overwritten by the updated vector y.

       INCY   - INTEGER.
	      On  entry,  INCY	specifies  the	increment for the elements of Y. INCY must not be
	      zero.  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.

BLAS routine				 16 October 1992				 ZHEMV(l)


All times are GMT -4. The time now is 04:05 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
UNIX.COM Login
Username:
Password:  
Show Password