Terminology

The variables x1. . . , xn are called decision variables of the

problem. The linear function to optimize is called function

objective (or function object). The constraints take the form of

linear equations and inequations.

Constraints of the form:

lj = xj = uj lj, uj ? R U {±8 }

are called terminals constraints, they are often summarized with

constraints of nonnegativity xj = 0 and are generally treated in a

special way by the algorithms of resolution. 

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