dlauu2(l) [redhat man page]

DLAUU2(l)								 )								 DLAUU2(l)

NAME

       DLAUU2  -  compute  the product U * U' or L' * L, where the triangular factor U or L is stored in the upper or lower triangular part of the
       array A

SYNOPSIS

       SUBROUTINE DLAUU2( UPLO, N, A, LDA, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDA, N

	   DOUBLE	  PRECISION A( LDA, * )

PURPOSE

       DLAUU2 computes the product U * U' or L' * 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.

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) DOUBLE PRECISION 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'; if UPLO = 'L', the lower triangle of A is overwritten with the lower triangle of the product L' * 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 version 3.0						   15 June 2000 							 DLAUU2(l)