The NEOS Server offers LINDOGlobal for the solution of global
optimization problems and mixed-integer nonlinear-constrained problems in GAMS format.
LINDO Global finds guaranteed globally optimal solutions to general
nonlinear problems with continuous and/or discrete variables. The LINDO
global optimization procedure (GOP) employs branch-and-cut methods to break
a nonlinear programming model into a list of subproblems. Each subproblem is
analyzed; the result of the analysis is one of the following: a) the
subproblem is shown to not have a feasible or optimal solution, b) an
optimal solution to the subproblem is found, e.g., because the subproblem is
shown to be convex, or c) the subproblem is further split into two or more
subproblems, which are then placed on the list. Given appropriate
tolerances, a solution is returned that is provably globally optimal to the
LINDO Global is developed by Lindo Systems, Inc,
which offers the LINDO API. The LINDO API is a library of optimization solvers and mathematical
programming tools that allows users to create their own optimization
The documentation for LINDOGlobal is available on the
GAMS LINDOGlobal webpage.
The user must submit a model in GAMS
format to solve an optimization problem. For security purposes, the model
submitted must adhere to the following conventions:
If you are unfamiliar with GAMS, the
GAMS Documentation includes a
GAMS Tutorial and
Examples of models in GAMS format can be found in the
GAMS model library.
By default, the NEOS Server limits the amount of output generated in the
listing file by turning off the symbol and unique element list, symbol cross
references, and restricting the rows and columns listed to zero. This
behavior can be changed by specifying the appropriate options in the model
file. See the
documentation on GAMS output
for further information.
You may optionally submit an options file if you wish to override the
default parameter settings for the solver. Currently, the NEOS Server can
only use optfile=1 with GAMS input. Therefore, any model that
specifies a different options file will not work as intended.
<modelname>.optfile = 1 ;
optfile = 1