Polyhedra Module
================
Polyhedron class allows users to build and inspect polyherons.
.. py:class:: Polyhedron
.. py:property:: equalities
Returns a list of the equalities in a polyhedron.
.. py:property:: inequalities
Returns a list of the inequalities in a polyhedron.
.. py:property:: constraints
Returns a list of the constraints of a polyhedron.
.. py:method:: disjoint(self)
Returns a polyhedron as a disjoint.
.. py:method:: isuniverse(self)
Return ``True`` if a polyhedron is the Universe set.
.. py:method:: subs(self, symbol, expression=None)
Substitutes an expression into a polyhedron and returns the result.
To create a polyhedron, the user can use the following functions to define equalities and inequalities as the constraints.
.. py:function:: Eq(left, right)
Returns a Polyhedron instance with a single constraint as *left* equal to *right*.
.. py:function:: Ne(left, right)
Returns a Polyhedron instance with a single constraint as *left* not equal to *right*.
.. py:function:: Lt(left, right)
Returns a Polyhedron instance with a single constraint as *left* less than *right*.
.. py:function:: Le(left, right)
Returns a Polyhedron instance with a single constraint as *left* less than or equal to *right*.
.. py:function:: Gt(left, right)
Returns a Polyhedron instance with a single constraint as *left* greater than *right*.
.. py:function:: Ge(left, right)
Returns a Polyhedron instance with a single constraint as *left* greater than or equal to *right*.