1ZLAUU2(1)           LAPACK auxiliary routine (version 3.1)           ZLAUU2(1)
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NAME

6       ZLAUU2 - the product U * U' or L' * L, where the triangular factor U or
7       L is stored in the upper or lower triangular part of the array A
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SYNOPSIS

10       SUBROUTINE ZLAUU2( UPLO, N, A, LDA, INFO )
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12           CHARACTER      UPLO
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14           INTEGER        INFO, LDA, N
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16           COMPLEX*16     A( LDA, * )
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PURPOSE

19       ZLAUU2 computes the product U * U' or L' * L, where the triangular fac‐
20       tor U or L is stored in the upper or lower triangular part of the array
21       A.
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23       If UPLO = 'U' or 'u' then the upper triangle of the result  is  stored,
24       overwriting the factor U in A.
25       If  UPLO  = 'L' or 'l' then the lower triangle of the result is stored,
26       overwriting the factor L in A.
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28       This is the unblocked form of the algorithm, calling Level 2 BLAS.
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ARGUMENTS

32       UPLO    (input) CHARACTER*1
33               Specifies whether the triangular factor stored in the  array  A
34               is upper or lower triangular:
35               = 'U':  Upper triangular
36               = 'L':  Lower triangular
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38       N       (input) INTEGER
39               The order of the triangular factor U or L.  N >= 0.
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41       A       (input/output) COMPLEX*16 array, dimension (LDA,N)
42               On  entry,  the  triangular  factor U or L.  On exit, if UPLO =
43               'U', the upper triangle of A is overwritten with the upper tri‐
44               angle  of the product U * U'; if UPLO = 'L', the lower triangle
45               of A is overwritten with the lower triangle of the product L' *
46               L.
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48       LDA     (input) INTEGER
49               The leading dimension of the array A.  LDA >= max(1,N).
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51       INFO    (output) INTEGER
52               = 0: successful exit
53               < 0: if INFO = -k, the k-th argument had an illegal value
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57 LAPACK auxiliary routine (versionNo3v.e1m)ber 2006                       ZLAUU2(1)
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