## The whole of the solutions of an inequation (linear) corresponds to a half space in RN (a half-plane in R2).

## The whole of the solutions of an equation (linear) corresponds to a hyperplan in RN (a line in R2).

## The whole of the solutions of a system of equations and inequations (linear) corresponds to the intersection of the half spaces and the hyperplans associated with each element with the system.

## This intersection, called acceptable field, is convex and defines a polyhedron in RN (a polygonal area in R2).

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