Armijo optimization

Posted by Marco Marchioro-2 on Nov 22, 2002; 2:46am
URL: http://quantlib.414.s1.nabble.com/Problems-in-Bermudan-Swaption-tp2297p2299.html

Hi,
I'm no optimization guru, but I found the following paper

http://csep1.phy.ornl.gov/mo/node11.html

which advices to use alpha=1.e-4 and beta=0.9 for Armijo and Goldstein
criteria.
At the moment QuantLib has default values alpha=0.5 and beta=0.65.
Should we change these default values?

Did anybody ever tested this algorithm?

Marco