The OpenNET Project / Index page

[ новости /+++ | форум | wiki | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

dtrmm (3)
  • >> dtrmm (3) ( Solaris man: Библиотечные вызовы )
  • 
    NAME
         dtrmm - perform one of the matrix-matrix operations    B  :=
         alpha*op( A )*B, or B := alpha*B*op( A )
    
    SYNOPSIS
         SUBROUTINE DTRMM ( SIDE, UPLO, TRANSA, DIAG, M, N, ALPHA, A,
                   LDA, B, LDB )
    
         CHARACTER*1 SIDE, UPLO, TRANSA, DIAG
    
         INTEGER M, N, LDA, LDB
    
         DOUBLE PRECISION ALPHA
    
         DOUBLE PRECISION A( LDA, * ), B( LDB, * )
    
    
    
         #include <sunperf.h>
    
         void dtrmm(char side, char uplo, char transa, char diag, int
                   m,  int n, double alpha, double *da, int lda, dou-
                   ble *db, int ldb) ;
    
    PURPOSE
         DTRMM  performs one of the  matrix-matrix  operations  B  :=
         alpha*op(  A )*B, or B := alpha*B*op( A ) where  alpha  is a
         scalar,  B  is an m by n matrix,  A  is a unit, or non-unit,
         upper or lower triangular matrix  and  op( A )  is one  of
    
            op( A ) = A   or   op( A ) = A'.
    
    
    PARAMETERS
         SIDE      - CHARACTER*1.
                   On entry,  SIDE specifies whether  op( A )  multi-
                   plies B from the left or right as follows:
    
                   SIDE = 'L' or 'l'   B := alpha*op( A )*B.
    
                   SIDE = 'R' or 'r'   B := alpha*B*op( A ).
    
                   Unchanged on exit.
    
         UPLO      - CHARACTER*1.
                   On entry, UPLO specifies whether the matrix  A  is
                   an upper or lower triangular matrix as follows:
    
                   UPLO = 'U' or  'u'    A  is  an  upper  triangular
                   matrix.
    
                   UPLO = 'L'  or  'l'    A  is  a  lower  triangular
                   matrix.
    
                   Unchanged on exit.
    
                   TRANSA - CHARACTER*1.  On entry, TRANSA  specifies
                   the  form of op( A ) to be used in the matrix mul-
                   tiplication as follows:
    
                   TRANSA = 'N' or 'n'   op( A ) = A.
    
                   TRANSA = 'T' or 't'   op( A ) = A'.
    
                   TRANSA = 'C' or 'c'   op( A ) = A'.
    
                   Unchanged on exit.
    
         DIAG      - CHARACTER*1.
                   On entry, DIAG specifies whether or not A is  unit
                   triangular as follows:
    
                   DIAG = 'U' or 'u'   A is assumed to be  unit  tri-
                   angular.
    
                   DIAG = 'N' or 'n'   A is not assumed  to  be  unit
                   triangular.
    
                   Unchanged on exit.
    
         M         - INTEGER.
                   On entry, M specifies the number of rows of  B.  M
                   must be at least zero.  Unchanged on exit.
    
         N         - INTEGER.
                   On entry, N specifies the number of columns of  B.
                   N must be at least zero.  Unchanged on exit.
    
         ALPHA     - DOUBLE PRECISION.
                   On entry,  ALPHA specifies the scalar  alpha. When
                   alpha  is  zero  then   A is not referenced and  B
                   need not be set before entry.  Unchanged on exit.
    
         A         - DOUBLE PRECISION array of DIMENSION ( LDA, k  ),
                   where k is m
                   when  SIDE = 'L' or 'l'  and is  n  when   SIDE  =
                   'R' or 'r'.
    
                   Before entry  with  UPLO = 'U' or 'u',  the  lead-
                   ing   k by k upper triangular part of the array  A
                   must contain the upper triangular matrix  and  the
                   strictly  lower triangular part of A is not refer-
                   enced.
    
                   Before entry  with  UPLO = 'L' or 'l',  the  lead-
                   ing   k by k lower triangular part of the array  A
                   must contain the lower triangular matrix  and  the
                   strictly  upper triangular part of A is not refer-
                   enced.
    
                   Note that when  DIAG = 'U' or 'u',   the  diagonal
                   elements of A  are not referenced either,  but are
                   assumed to be  unity.  Unchanged on exit.
    
         LDA       - INTEGER.
                   On entry, LDA specifies the first dimension  of  A
                   as  declared  in  the calling (sub) program.  When
                   SIDE = 'L' or 'l'  then  LDA   must  be  at  least
                   max(  1,  m  ),   when  SIDE = 'R' or 'r' then LDA
                   must be at least max( 1, n ).  Unchanged on exit.
    
         B         - DOUBLE PRECISION array of DIMENSION ( LDB, n ).
                   Before entry,  the leading  m by  n  part  of  the
                   array  B must contain the matrix  B,  and  on exit
                   is overwritten  by the transformed matrix.
    
         LDB       - INTEGER.
                   On entry, LDB specifies the first dimension  of  B
                   as  declared  in   the   calling   (sub)  program.
                   LDB  must  be  at  least max( 1, m  ).   Unchanged
                   on exit.
    
    
    
    


    Поиск по тексту MAN-ов: 




    Партнёры:
    PostgresPro
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2024 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру