cspmv man page on YellowDog

Man page or keyword search:  
man Server   18644 pages
apropos Keyword Search (all sections)
Output format
YellowDog logo
[printable version]

CSPMV(l)			       )			      CSPMV(l)

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

SYNOPSIS
       SUBROUTINE CSPMV( UPLO, N, ALPHA, AP, X, INCX, BETA, Y, INCY )

	   CHARACTER	 UPLO

	   INTEGER	 INCX, INCY, N

	   COMPLEX	 ALPHA, BETA

	   COMPLEX	 AP( * ), X( * ), Y( * )

PURPOSE
       CSPMV  performs	the  matrix-vector  operation y := alpha*A*x + beta*y,
       where alpha and beta are scalars, x and y are n element vectors	and  A
       is an n by n symmetric matrix, supplied in packed form.

ARGUMENTS
       UPLO   - CHARACTER*1
	      On  entry,  UPLO specifies whether the upper or lower triangular
	      part of the matrix A is supplied in the packed array AP as  fol‐
	      lows:

	      UPLO  =  'U' or 'u'   The upper triangular part of A is supplied
	      in AP.

	      UPLO = 'L' or 'l'	  The lower triangular part of A  is  supplied
	      in AP.

	      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
	      On entry, ALPHA specifies the scalar alpha.  Unchanged on exit.

       AP     - COMPLEX array, dimension at least
	      ( ( N*( N + 1 ) )/2 ).  Before entry, with UPLO =	 'U'  or  'u',
	      the  array AP must contain the upper triangular part of the sym‐
	      metric matrix packed sequentially, column by column, so that AP(
	      1	 )  contains  a( 1, 1 ), AP( 2 ) and AP( 3 ) contain a( 1, 2 )
	      and a( 2, 2 ) respectively, and so on.  Before entry, with  UPLO
	      =	 'L'  or  'l',	the array AP must contain the lower triangular
	      part of the symmetric matrix packed sequentially, column by col‐
	      umn,  so	that  AP(  1 ) contains a( 1, 1 ), AP( 2 ) and AP( 3 )
	      contain a( 2, 1 ) and  a(	 3,  1	)  respectively,  and  so  on.
	      Unchanged on exit.

       X      - COMPLEX array, 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
	      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 array, 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 over‐
	      written 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.

LAPACK version 3.0		 15 June 2000			      CSPMV(l)
[top]

List of man pages available for YellowDog

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net