GAMS

The General Algebraic Modeling System (GAMS) is a high-level modeling system for mathematical programming and optimization. It consists of a language compiler and a stable of integrated high-performance solvers. GAMS is tailored for complex, large scale modeling applications, and allows you to build large maintainable models that can be adapted quickly to new situations. GAMS is specifically designed for modeling linear, nonlinear and mixed integer optimization problems. Through this, GAMS lets the user concentrate on modeling. GAMS encourages good modeling habits itself by requiring concise and exact specification of entities and relationships. The GAMS language is formally similar to common programming languages. It is therefore familiar to anyone with programming experience. But since the model is formulated in a way that is similar to its mathematical description, it can be understood and maintained not only by programmers, but also by the actual domain experts. GAMS focuses on the modeler and allows him to do all relevant things himself. The balanced mix of declarative and procedural elements allows building complex algorithms and even the implementation of decomposition methods in GAMS. This is especially relevant for models addressing unusual problems that oftentimes come along with performance issues.