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lbfgs
is an implementation of the L-BFGS algorithm [1]
to solve unconstrained minimization problems via a limited-memory quasi-Newton (BFGS) algorithm.
It is called a limited-memory method because a low-rank approximation of the
Hessian matrix inverse is stored instead of the entire Hessian inverse.
The program was originally written in Fortran [2] by Jorge Nocedal,
incorporating some functions originally written by Jorge J. Moré and David J. Thuente,
and translated into Lisp automatically via the program f2cl
.
The Maxima package lbfgs
comprises the translated code plus
an interface function which manages some details.
References:
[1] D. Liu and J. Nocedal. "On the limited memory BFGS method for large scale optimization". Mathematical Programming B 45:503–528 (1989)
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