[Scipy-tickets] [SciPy] #734: errors in fmin_bfgs and some improvements

SciPy Trac scipy-tickets@scipy....
Sat Nov 13 08:49:04 CST 2010

#734: errors in fmin_bfgs and some improvements
 Reporter:  jgarcke         |       Owner:  cdavid      
     Type:  defect          |      Status:  needs_review
 Priority:  normal          |   Milestone:  0.9.0       
Component:  scipy.optimize  |     Version:  0.5.2       
 Keywords:                  |  

Comment(by rgommers):

 The parts that are still relevant are here:

 The change to compute sk is straightforward. The change in handling div-
 by-zero looks fine too.

 Two questions for the extra stopping criterion:
 1. How did you choose the 1e-6 number? I couldn't find that in the
 reference you supplied.
 2. Do you have a test for this?

Ticket URL: <http://projects.scipy.org/scipy/ticket/734#comment:4>
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