The Gurobi Optimizer is a state-of-the-art simplex
based linear programming (LP) and mixed-integer
programming (MIP) solver, built from the ground up
to exploit modern multi-core processors. Parallelism
is included with every Gurobi license. The Gurobi
Parallel MIP Optimizer is deterministic: two
separate runs on the same model will produce
identical solution paths.
The Gurobi Optimizer is written in C and is
accessible from several languages. In addition to a
powerful, interactive Python interface and a
matrix-oriented C interface, we provide
object-oriented interfaces from C++, Java, and
Python. These interfaces have all been designed to
be lightweight and easy to use, with the goal of
greatly enhancing the accessibility of our products.
And since the interfaces are lightweight, they are
faster and use less memory than other standard
interfaces. Our online documentation (Quick Start
Guide, Example Tour and Reference Manual) describes
the use of these interfaces. We also have a .NET
interface through Microsoft Solver Foundation (MSF).
The Gurobi Optimizer is the default MIP solver in
MSF.
Gurobi is also available through several powerful
third-party modeling systems including AIMMS, AMPL,
FRONTLINE SOLVERS, GAMS, MPL, OptimJ, and TOMLAB.
Version 2.0 of the Gurobi Optimizer includes a
number of enhancements:
* Significant improvements in MIP performance: For
difficult models, Gurobi 2.0 is roughly four times
as fast as Gurobi 1.1.
* Significant improvements in simplex performance:
The new dual simplex optimizer is roughly twice as
fast as Gurobi 1.1.
* Improvements in parallel MIP performance: Gurobi
2.0 extracts more benefit from each additional
core in your multi-core system.
* MIP IIS (Irreducible Infeasible Subsystem): Gurobi
2.0 can identify the causes of infeasibility in
MIP as well as LP models.
* MIP node files: Allow you to store MIP nodes on
disk and thus solve much larger MIP models.
* Cloud computing: Gurobi is now available on-demand
via the Amazon Elastic Computing Cloud.
* New examples: An extensive new set of examples
illustrates key features and uses for Gurobi in
all supported languages.
* Support for Mac OS X.
Version 3.0 of the Gurobi Optimizer contains a
number of new features. Users of previous versions
may need to make a few minor changes to their
existing programs.
* Barrier optimizer: The Gurobi Optimizer now
includes a parallel barrier optimizer, and a
crossover algorithm to transform the barrier
solution to an optimal basic solution. Use the
LPMethod parameter to select barrier for a
continuous model, or the RootMethod parameter to
select barrier for the root relaxation of a MIP
model.
* .NET interface: You can now use the Gurobi
Optimizer from Microsoft .NET languages (C#,
Visual Basic.NET, etc.). Our .NET interface is
object-oriented, and supports the same object
model as our C++, Java, and Python interfaces.
We\’ve included a complete reference manual, as
well as on-line InteliSense help for use within
Visual Studio. We\’ve also included a full set of
examples in both C# and Visual Basic.NET.
* MIP performance: The MIP solver is significantly
faster in release 3.0. New features include
symmetry handling, improved and additional cutting
planes, and additional MIP heuristics.
* MIP memory management: The MIP solver manages
memory more efficiently. Memory usage is reduced
for most models, and node files make more
effective use of available memory.
* Alternate MIP solutions: You can now retrieve any
of the feasible solutions found during the
branch-and-cut search.
* Presolve: Additional presolve reductions have been
added, which help LP and MIP performance.
* MPS and LP reader performance improvements: MPS
and LP files read as much as 3X faster.
* New Mac installer: We\’ve built a new installer for
the Mac port. You can now simply double-click on
our distributed Gurobi package.
* New attributes and parameters: To support the new
features in Gurobi 3.0, we have added several new
attributes and parameters. You can learn more
about these in the Attributes and Parameters
sections of the {Gurobi Reference Manual}.
Product:Gurobi Optimization Gurobi v3.0.1
Lanaguage:english
Platform:Winxp/Win7
Size:25 MB