1SGER(1)                          BLAS routine                          SGER(1)
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NAME

6       SGER - performs the rank 1 operation   A := alpha*x*y' + A,
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SYNOPSIS

9       SUBROUTINE SGER(M,N,ALPHA,X,INCX,Y,INCY,A,LDA)
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11           REAL                                       ALPHA
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13           INTEGER                                    INCX,INCY,LDA,M,N
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15           REAL                                       A(LDA,*),X(*),Y(*)
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PURPOSE

18       SGER   performs the rank 1 operation
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20       where  alpha  is  a scalar, x is an m element vector, y is an n element
21       vector and A is an m by n matrix.
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ARGUMENTS

25       M      - INTEGER.
26              On entry, M specifies the number of rows of  the  matrix  A.   M
27              must be at least zero.  Unchanged on exit.
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29       N      - INTEGER.
30              On  entry, N specifies the number of columns of the matrix A.  N
31              must be at least zero.  Unchanged on exit.
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33       ALPHA  - REAL            .
34              On entry, ALPHA specifies the scalar alpha.  Unchanged on exit.
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36       X      - REAL             array of dimension at least
37              ( 1 + ( m - 1 )*abs( INCX ) ).  Before  entry,  the  incremented
38              array X must contain the m element vector x.  Unchanged on exit.
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40       INCX   - INTEGER.
41              On  entry,  INCX  specifies the increment for the elements of X.
42              INCX must not be zero.  Unchanged on exit.
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44       Y      - REAL             array of dimension at least
45              ( 1 + ( n - 1 )*abs( INCY ) ).  Before  entry,  the  incremented
46              array Y must contain the n element vector y.  Unchanged on exit.
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48       INCY   - INTEGER.
49              On  entry,  INCY  specifies the increment for the elements of Y.
50              INCY must not be zero.  Unchanged on exit.
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52       A      - REAL             array of DIMENSION ( LDA, n ).
53              Before entry, the leading m by n part of the array A  must  con‐
54              tain  the  matrix  of coefficients. On exit, A is overwritten by
55              the updated matrix.
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57       LDA    - INTEGER.
58              On entry, LDA specifies the first dimension of A as declared  in
59              the  calling  (sub)  program.  LDA must be at least max( 1, m ).
60              Unchanged on exit.
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FURTHER DETAILS

63       Level 2 Blas routine.
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65       -- Written on 22-October-1986.
66          Jack Dongarra, Argonne National Lab.
67          Jeremy Du Croz, Nag Central Office.
68          Sven Hammarling, Nag Central Office.
69          Richard Hanson, Sandia National Labs.
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74BLAS routine                     November 2008                         SGER(1)