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#Integer programming frontline solver how to#
For advice on explanatory text and how to choose a model_name, see the tutorial Good Coding Practices. More details about this are described in the following subsection. Var_name(set_name) is a couple of previous declared variable and and set to limit the domain of variables in the model. The optional explanatory text is used to describe the model, all is a keyword as introduced above and eqn_name is the name of an equation that has been declared prior to the model statement. The keyword model indicates that this is a model statement and model_name is the internal name of the model in GAMS, it is an identifier. In general, the syntax for a model declaration in GAMS is as follows: model model_name [/ (all | eqn_name For most simple applications this is all the user needs to know about the model statement. The simplest form of the model statement uses the keyword all: the model consists of all equations declared before the model statement is entered. The model statement is used to collect equations into groups and to label them so that they can be solved. This chapter brings together all the concepts discussed in previous chapters by explaining how to specify a model and solve it. Iterative Implementation of Non-Standard Algorithms.Customizing Solution Management: SolveOpt.Actions Triggered by the Solve Statement.Model Attributes Mainly Used After Solve.Model Attributes Mainly Used Before Solve.Mathematical Program with Equilibrium Constraints (MPEC).Mixed Integer Quadratically Constrained Programs (MIQCP).Mixed Integer Nonlinear Programming (MINLP).Nonlinear Programming with Discontinuous Derivatives (DNLP).Quadratically Constrained Programs (QCP).