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NEOS Server: State-of-the-Art Solvers for Numerical Optimization

The NEOS Server is a free internet-based service for solving numerical optimization problems. Hosted by the Wisconsin Institute for Discovery at the University of Wisconsin in Madison, the NEOS Server provides access to more than 60 state-of-the-art solvers in more than a dozen optimization categories. Solvers hosted by the University of Wisconsin in Madison run on distributed high-performance machines enabled by the HTCondor software; remote solvers run on machines at Argonne National Laboratory, Arizona State University, the University of Klagenfurt in Austria, and the University of Minho in Portugal.

The NEOS Guide website complements the NEOS Server, showcasing optimization case studies, presenting optimization information and resources, and providing background information on the NEOS Server.

Latest NEOS News
June 27, 2017
The NEOS Server will be down for maintenance Wednesday, July 5th from 8am - 10am CDT.
June 10, 2017
You can use your NEOS user account to submit authenticated jobs through the web or XML-RPC interfaces. More information is available in our XML-RPC API.
May 28, 2017
We have re-enabled user accounts with improved functionality and security. You will need to reset your password to access an existing account.
Jan 1, 2017
Sign up for a NEOS user account to receive better service! When you Sign Up for a user account and Sign In before you submit your jobs, you will receive higher priority job scheduling and access to the newest feature, a "My Jobs" tab with a list of your recent jobs and links to the results. For more information on the introduction of authentication services, read the March 2016 article, NEOS Optimizes Itself: New Solvers and Authentication Services Added, at the Wisconsin Institute for Discovery website.

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