X-Git-Url: https://svn.cri.ensmp.fr/git/linpy.git/blobdiff_plain/98936866ae400d45b7b74f7ba0d04c66ace0424f..454a26a54cc7ff563ab278567f3bbad9c6ff42bb:/doc/polyhedra.rst?ds=inline

diff --git a/doc/polyhedra.rst b/doc/polyhedra.rst
index 779be46..f6f1a30 100644
--- a/doc/polyhedra.rst
+++ b/doc/polyhedra.rst
@@ -1,58 +1,74 @@
 Polyhedra Module
 ================
 
-.. py:class:: Polyhedron
+Polyhedron class allows users to build and inspect polyherons. Polyhedron inherits all methods from the :class:`Domain` class.
 
-    Polyhedron class allows users to build and inspect polyherons.  The following methods provide the properties of a polyhedron. 
+.. py:class:: Polyhedron(Domain)
 
-    .. py:method:: equalities(self)
+    .. py:method::  __new__(cls, equalities=None, inequalities=None)
     
-        Return a list of the equalities in a polyhedron.
-        
-    .. py:method:: inequalities(self)
-    
-        Return a list of the inequalities in a polyhedron.
+        Create and return a new Polyhedron from a string or list of equalities and inequalities.
 
-    .. py:method:: constraints(self)
-    
-        Return ta list of the constraints of a polyhedron.
+    .. attribute:: equalities
+
+        Returns a list of the equalities in a polyhedron.
+
+    .. attribute:: inequalities
+
+        Returns a list of the inequalities in a polyhedron.
+
+    .. attribute:: constraints
+
+        Returns a list of the constraints of a polyhedron.
+
+    .. py:method:: make_disjoint(self)
 
-    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:: aspolyhedron(self)
     
-        Return ``True`` if a polyhedron is the Universe set.    
+        Return the polyhedral hull of a polyhedron.    
+
+    .. py:method:: __contains__(self, point)
+
+        Report whether a polyhedron constains an integer point
 
     .. 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 the equalities and inequalities which are the contraints of a polyhedron.
-   
-.. py:function:: Eq(left, right)
-   
-   Create a constraint by setting *left* equal to *right*.         
+        Subsitute the given value into an expression and return the resulting
+        expression.
+
+    .. py:method:: fromstring(cls, string)
         
+        Create and return a Polyhedron from a string.
+       
+
+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)
 
-    Create a constraint by setting *left* not equal to *right*.
-            
+   Returns a Polyhedron instance with a single constraint as *left* not equal to *right*.
+
 .. py:function:: Lt(left, right)
-    
-   Create a constraint by setting *left* less than *right*. 
-        
+
+   Returns a Polyhedron instance with a single constraint as *left* less than *right*.
+
 .. py:function:: Le(left, right)
-    
-   Create a constraint by setting *left* less than or equal to *right*.     
-        
+
+   Returns a Polyhedron instance with a single constraint as *left* less than or equal to *right*.
+
 .. py:function:: Gt(left, right)
-    
-   Create a constraint by setting *left* greater than *right*.        
+
+   Returns a Polyhedron instance with a single constraint as *left* greater than *right*.
 
 .. py:function:: Ge(left, right)
-    
-   Create a constraint by setting *left* greater than or equal to *right*. 
+
+   Returns a Polyhedron instance with a single constraint as *left* greater than or equal to *right*.