NAME

       zlauu2.f -

SYNOPSIS

   Functions/Subroutines
       subroutine zlauu2 (UPLO, N, A, LDA, INFO)
           ZLAUU2 computes the product UUH or LHL, where U and L are upper or lower triangular
           matrices (unblocked algorithm).

Function/Subroutine Documentation

   subroutine zlauu2 (character UPLO, integer N, complex*16, dimension( lda, * ) A, integer LDA,
       integer INFO)
       ZLAUU2 computes the product UUH or LHL, where U and L are upper or lower triangular
       matrices (unblocked algorithm).

       Purpose:

            ZLAUU2 computes the product U * U**H or L**H * L, where the triangular
            factor U or L is stored in the upper or lower triangular part of
            the array A.

            If UPLO = 'U' or 'u' then the upper triangle of the result is stored,
            overwriting the factor U in A.
            If UPLO = 'L' or 'l' then the lower triangle of the result is stored,
            overwriting the factor L in A.

            This is the unblocked form of the algorithm, calling Level 2 BLAS.

       Parameters:
           UPLO

                     UPLO is CHARACTER*1
                     Specifies whether the triangular factor stored in the array A
                     is upper or lower triangular:
                     = 'U':  Upper triangular
                     = 'L':  Lower triangular

           N

                     N is INTEGER
                     The order of the triangular factor U or L.  N >= 0.

           A

                     A is COMPLEX*16 array, dimension (LDA,N)
                     On entry, the triangular factor U or L.
                     On exit, if UPLO = 'U', the upper triangle of A is
                     overwritten with the upper triangle of the product U * U**H;
                     if UPLO = 'L', the lower triangle of A is overwritten with
                     the lower triangle of the product L**H * L.

           LDA

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

           INFO

                     INFO is INTEGER
                     = 0: successful exit
                     < 0: if INFO = -k, the k-th argument had an illegal value

       Author:
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Date:
           September 2012

Author

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