Provided by: liblapack-doc_3.3.1-1_all

#### NAME

```       LAPACK-3  -  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

```

#### SYNOPSIS

```       SUBROUTINE ZLAUUM( UPLO, N, A, LDA, INFO )

CHARACTER      UPLO

INTEGER        INFO, LDA, N

COMPLEX*16     A( LDA, * )

```

#### PURPOSE

```       ZLAUUM 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 blocked form of the algorithm, calling Level 3 BLAS.

```

#### ARGUMENTS

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

N       (input) INTEGER
The order of the triangular factor U or L.  N >= 0.

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

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

LAPACK auxiliary routine (version 3.3.1)   April 2011                            ZLAUUM(3lapack)
```