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/usr/share/octave/site/m/nlopt/NLOPT_LD_LBFGS_NOCEDAL.m is in octave-nlopt 2.4.2+dfsg-2.

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% NLOPT_LD_LBFGS_NOCEDAL: original NON-FREE L-BFGS code by Nocedal et al. (NOT COMPILED)
%
% See nlopt_minimize for more information.
function val = NLOPT_LD_LBFGS_NOCEDAL
  val = 10;