There are two types of constraints: equality constraints and inequality constraints.

DVIs are useful for representing models involving both dynamics and inequality constraints.

Unlike earlier versions, the models of von Neumann had inequality constraints.

The above quadratic program involves a very large, possibly infinite number of linear inequality constraints.

Note that every equality constraint can be equivalently replaced by a pair of inequality constraints and .

These added costs are used instead of the strict inequality constraints in the optimization.

In addition, inequality constraints are also initially specified between some of the squares, such that one must be higher or lower than its neighbour.

Each time average inequality constraint was mapped to a virtual queue according to (Eq.

Equality constraints can be replaced by two inequality constraints.

The method can be extended to handle inequality constraints.