Polyhedra Module
================
.. py:class:: Polyhedron
Polyhedron class allows users to build and inspect polyherons. The following methods provide the properties of a polyhedron.
.. py:method:: equalities(self)
Return a list of the equalities in a polyhedron.
.. py:method:: inequalities(self)
Return a list of the inequalities in a polyhedron.
.. py:method:: constraints(self)
Return ta list of the constraints of a polyhedron.
The following unary operations can be used to inspect 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)
Subsitutes an expression into a polyhedron and returns the result.
To create a polyhedron, the user must use the folloing functions to define equalities and inequalities as the contraints.
.. py:function:: Eq(left, right)
Create a constraint by setting *left* equal to *right*.
.. py:function:: Ne(left, right)
Create a constraint by setting *left* not equal to *right*.
.. py:function:: Lt(left, right)
Create a constraint by setting *left* less than *right*.
.. py:function:: Le(left, right)
Create a constraint by setting *left* less than or equal to *right*.
.. py:function:: Gt(left, right)
Create a constraint by setting *left* greater than *right*.
.. py:function:: Ge(left, right)
Create a constraint by setting *left* greater than or equal to *right*.