The NEOS Server offers the Gurobi
Optimizer for the solution of linear programming (LP) problems,
mixed-integer linear programming (MILP) problems, and second-order conic
programming (SOCP) problems. LPs and MILPs can be submitted
to Gurobi on the NEOS server in AMPL, GAMS, LP, or MPS format. SOCPs can be
submitted in AMPL, GAMS or NL format.
The Gurobi Optimizer is a state-of-the-art solver for mathematical
programming. The solvers in the Gurobi Optimizer were designed from
the ground up to exploit modern architectures and multi-core
processors. For more information on Gurobi products and services, see
the Gurobi website.
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