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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.