graeme_p - 8:32 am on Mar 17, 2010 (gmt 0)
@tedster, I am not sure I see why a dampening factor is necessary for stable values. I though what they do is effectively solve a giant simultaneous equation, as in the linear algebra section here: [math.cornell.edu ]
The real maths is likely to be more complex as well as larger scale, but the principle should be the same. An iterative approach should (if they use it, which I doubt as it looks more computationally intensive to me) should give the same answers.