cpotf2 man page on Scientific

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```CPOTF2(1)		 LAPACK routine (version 3.2)		     CPOTF2(1)

NAME
CPOTF2  -  computes  the	 Cholesky factorization of a complex Hermitian
positive definite matrix A

SYNOPSIS
SUBROUTINE CPOTF2( UPLO, N, A, LDA, INFO )

CHARACTER	  UPLO

INTEGER	  INFO, LDA, N

COMPLEX	  A( LDA, * )

PURPOSE
CPOTF2 computes the Cholesky factorization of a complex Hermitian posi‐
tive definite matrix A.	The factorization has the form
A = U' * U ,	if UPLO = 'U', or
A = L	 * L',	if UPLO = 'L',
where  U is an upper triangular matrix and L is lower triangular.  This
is the unblocked version of the algorithm, calling Level 2 BLAS.

ARGUMENTS
UPLO    (input) CHARACTER*1
Specifies whether the upper or lower  triangular	 part  of  the
Hermitian matrix A is stored.  = 'U':  Upper triangular
= 'L':  Lower triangular

N       (input) INTEGER
The order of the matrix A.  N >= 0.

A       (input/output) COMPLEX array, dimension (LDA,N)
On entry, the Hermitian matrix A.  If UPLO = 'U', the leading n
by n upper triangular part of A contains the  upper  triangular
part of the matrix A, and the strictly lower triangular part of
A is not referenced.  If UPLO = 'L', the leading n by  n	 lower
triangular  part of A contains the lower triangular part of the
matrix A, and the strictly upper triangular part of  A  is  not
referenced.   On	 exit, if INFO = 0, the factor U or L from the
Cholesky factorization A = U'*U	or A = 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
> 0: if INFO = k, the leading minor of order k is not  positive
definite, and the factorization could not be completed.

LAPACK routine (version 3.2)	 November 2008			     CPOTF2(1)
```
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