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zlaset

 NAME
      ZLASET - initialize a 2-D array A to BETA on the diagonal
      and ALPHA on the offdiagonals

 SYNOPSIS
      SUBROUTINE ZLASET( UPLO, M, N, ALPHA, BETA, A, LDA )

          CHARACTER      UPLO

          INTEGER        LDA, M, N

          COMPLEX*16     ALPHA, BETA

          COMPLEX*16     A( LDA, * )

 PURPOSE
      ZLASET initializes a 2-D array A to BETA on the diagonal and
      ALPHA on the offdiagonals.

 ARGUMENTS
      UPLO    (input) CHARACTER*1
              Specifies the part of the matrix A to be set.  =
              'U':      Upper triangular part is set. The lower
              triangle is unchanged.  = 'L':      Lower triangular
              part is set. The upper triangle is unchanged.  Oth-
              erwise:  All of the matrix A is set.

      M       (input) INTEGER
              On entry, M specifies the number of rows of A.

      N       (input) INTEGER
              On entry, N specifies the number of columns of A.

      ALPHA   (input) COMPLEX*16
              All the offdiagonal array elements are set to ALPHA.

      BETA    (input) COMPLEX*16
              All the diagonal array elements are set to BETA.

      A       (input/output) COMPLEX*16 array, dimension (LDA,N)
              On entry, the m by n matrix A.  On exit, A(i,j) =
              ALPHA, 1 <= i <= m, 1 <= j <= n, i.ne.j; A(i,i) =
              BETA , 1 <= i <= min(m,n)

      LDA     (input) INTEGER
              The leading dimension of the array A.  LDA >=
              max(1,M).