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NAME

```       CGERC - perform the rank 1 operation   A := alpha*x*conjg( y' ) + A,

```

SYNOPSIS

```       SUBROUTINE CGERC ( M, N, ALPHA, X, INCX, Y, INCY, A, LDA )

COMPLEX      ALPHA

INTEGER      INCX, INCY, LDA, M, N

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

```

PURPOSE

```       CGERC  performs the rank 1 operation

where  alpha is a scalar, x is an m element vector, y is an n element vector and A is an m
by n matrix.

```

PARAMETERS

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

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

Y      - COMPLEX          array of dimension at least
( 1 + ( n - 1 )*abs( INCY ) ).  Before entry, the incremented array Y must  contain
the n element vector y.  Unchanged on exit.

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

A      - COMPLEX          array of DIMENSION ( LDA, n ).
Before entry, the leading m by n part of the array A must  contain  the  matrix  of
coefficients. On exit, A is overwritten by the updated matrix.

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.

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.
```