CSYR(3)
performs the symmetric rank 1 operation A := alpha*x*( x' ) + A,
SYNOPSIS
 SUBROUTINE CSYR(

UPLO, N, ALPHA, X, INCX, A, LDA )

CHARACTER
UPLO

INTEGER
INCX, LDA, N

COMPLEX
ALPHA

COMPLEX
A( LDA, * ), X( * )
PURPOSE
CSYR performs the symmetric rank 1 operation
where alpha is a complex scalar, x is an n element vector and A is an
n by n symmetric matrix.
ARGUMENTS
 UPLO (input) CHARACTER*1

On entry, UPLO specifies whether the upper or lower
triangular part of the array A is to be referenced as
follows:
UPLO = 'U' or 'u' Only the upper triangular part of A
is to be referenced.
UPLO = 'L' or 'l' Only the lower triangular part of A
is to be referenced.
Unchanged on exit.
 N (input) INTEGER

On entry, N specifies the order of the matrix A.
N must be at least zero.
Unchanged on exit.
 ALPHA (input) COMPLEX

On entry, ALPHA specifies the scalar alpha.
Unchanged on exit.
 X (input) COMPLEX array, dimension at least

( 1 + ( N  1 )*abs( INCX ) ).
Before entry, the incremented array X must contain the N
element vector x.
Unchanged on exit.
 INCX (input) INTEGER

On entry, INCX specifies the increment for the elements of
X. INCX must not be zero.
Unchanged on exit.
 A (input/output) COMPLEX array, dimension ( LDA, N )

Before entry, with UPLO = 'U' or 'u', the leading n by n
upper triangular part of the array A must contain the upper
triangular part of the symmetric matrix and the strictly
lower triangular part of A is not referenced. On exit, the
upper triangular part of the array A is overwritten by the
upper triangular part of the updated matrix.
Before entry, with UPLO = 'L' or 'l', the leading n by n
lower triangular part of the array A must contain the lower
triangular part of the symmetric matrix and the strictly
upper triangular part of A is not referenced. On exit, the
lower triangular part of the array A is overwritten by the
lower triangular part of the updated matrix.
 LDA (input) INTEGER

On entry, LDA specifies the first dimension of A as declared
in the calling (sub) program. LDA must be at least
max( 1, N ).
Unchanged on exit.