*Ehrhart polynomials* associated to each of the distinct
validity domains correspond to the number of integer points contained
in a parameterized polytope, when the parameters are integers.

Ehrjart polynomials
are *pseudo-polynomials*, that is to say,
polynomials whose coefficients are
*periodic numbers*. Periodic numbers take different values depending
on the rest of the division of the parameters by the *period* of
this periodic number.

The function `Polyhedron_Enumerate`, returns a list of validity
domains and each corresponding Ehrhart polynomial.

Sorin Olaru 2002-04-24