Strange behaviour of \ w.r.t. chol

[Marco Caliari]

> The dpotrf function does not return info > 0 values

Maybe I misunderstood, but in the dpotrf documentation it is written

*  INFO    (output) INTEGER
*          = 0:  successful exit
*          < 0:  if INFO = -i, the i-th argument had an illegal value
*          > 0:  if INFO = i, the leading minor of order i is not
*                positive definite, and the factorization could not be
*                completed.

So, if INFO == 0 from dpotrf, I would keep the result in any case, with 
the warning in case of rcond small.

Marco