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zgemv (3)
  • >> zgemv (3) ( Solaris man: Библиотечные вызовы )
  • 
    NAME
         zgemv - perform one of the  matrix-vector  operations  y  :=
         alpha*A*x  +  beta*y, or y := alpha*A'*x + beta*y, or   y :=
         alpha*conjg( A' )*x + beta*y
    
    SYNOPSIS
         SUBROUTINE ZGEMV ( TRANS, M, N,  ALPHA,  A,  LDA,  X,  INCX,
                   BETA, Y, INCY )
    
         COMPLEX*16 ALPHA, BETA
    
         INTEGER INCX, INCY, LDA, M, N
    
         CHARACTER*1 TRANS
    
         COMPLEX*16 A( LDA, * ), X( * ), Y( * )
    
    
    
         #include <sunperf.h>
    
         void zgemv(char trans, int m, int n, doublecomplex  *zalpha,
                   doublecomplex *za, int lda, doublecomplex * x, int
                   incx, doublecomplex *zbeta, doublecomplex *zy, int
                   incy) ;
    
    PURPOSE
         ZGEMV  performs one of the  matrix-vector  operations  y  :=
         alpha*A*x  +  beta*y, or y := alpha*A'*x + beta*y, or   y :=
         alpha*conjg( A' )*x +  beta*y,  where  alpha  and  beta  are
         scalars, x and y are vectors and A is an m by n matrix.
    
    
    PARAMETERS
         TRANS     - CHARACTER*1.
                   On entry, TRANS specifies the operation to be per-
                   formed as follows:
    
                   TRANS = 'N' or 'n'   y := alpha*A*x + beta*y.
    
                   TRANS = 'T' or 't'   y := alpha*A'*x + beta*y.
    
                   TRANS = 'C' or 'c'   y := alpha*conjg(  A'  )*x  +
                   beta*y.
    
                   Unchanged on exit.
    
         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.
    
         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.
                   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, m ).  Unchanged on exit.
    
         X         - COMPLEX*16       array of DIMENSION at least
                   ( 1 + ( n - 1 )*abs( INCX ) ) when TRANS = 'N'  or
                   'n'  and  at  least  ( 1 + ( m - 1 )*abs( INCX ) )
                   otherwise.  Before entry, the incremented array  X
                   must contain the 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 + ( m - 1 )*abs( INCY ) ) when TRANS = 'N'  or
                   'n'  and  at  least  ( 1 + ( n - 1 )*abs( INCY ) )
                   otherwise.  Before entry with BETA  non-zero,  the
                   incremented  array Y must contain the 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.
    
    
    
    


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