lbfgs

• Subject: lbfgs
• From: Robert Gloeckner
• Date: Fri, 24 Nov 2006 18:11:32 +0100

** Reply Requested When Convenient **

Hallo Robert,

thank you for your hints on lbfgs.
The function works very good. 

As describe(lbfgs) does not have any informations (as you said earlier), could you give me an url/hint about the last parameter / output  / underlying algorithm?

    lbfgs(error_func, [var_list], [first guess], accuracy, [??]);

    I          = (iteration?)
    NFN        =  
    FUNC       = function to be minimized (f(...) - y)^2 ?
    GNORM      = (geometric?) norm 
    STEPLENGTH = relative step length?

What do i have to care about (regarding to lbfgs), if i would like to a sequence of minimizations? I mean, are there global/special variables which have to be reseted before each turn?


Thanks,
Robert

P.S.: I just noticed that the modified mactex2ooo.lisp (OpenOffice.org output filter) does work under maxima5.9.10 as well. Next year I will do help to put this into a more accurate way.

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