CLAUUM man page on IRIX

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CLAUUM(3F)							    CLAUUM(3F)

NAME
     CLAUUM - 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 CLAUUM( UPLO, N, A, LDA, INFO )

	 CHARACTER	UPLO

	 INTEGER	INFO, LDA, N

	 COMPLEX	A( LDA, * )

PURPOSE
     CLAUUM 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 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 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

									Page 1

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