Hi,

there is Phenix mailing list for questions like this (http://phenix-online.org/).

This should answer your question:
http://cci.lbl.gov/publications/download/iucrcompcomm_aug2004.pdf

Pavel


On Mon, Aug 6, 2012 at 9:07 AM, Scott Foy <[log in to unmask]> wrote:
Hello everyone,

I am having a difficult time determining what type of geometry regularization algorithm is used in Phenix.pdbtools (e.g., least squares, maximum likelihood, energy minimization, etc.).  I would appreciate if anyone can clarify, as well as point me to the appropriate documentation.

Thank you for your help.