X-Git-Url: https://svn.cri.ensmp.fr/git/linpy.git/blobdiff_plain/25ce908cffca380f930182a77c1e5a4491042a1c..960f0c252361dfd696359f803aae40a9b13b14a6:/pypol/polyhedra.py

diff --git a/pypol/polyhedra.py b/pypol/polyhedra.py
index fe143d4..9bfc64b 100644
--- a/pypol/polyhedra.py
+++ b/pypol/polyhedra.py
@@ -1,3 +1,20 @@
+# Copyright 2014 MINES ParisTech
+#
+# This file is part of Linpy.
+#
+# Linpy is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Linpy is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Linpy.  If not, see <http://www.gnu.org/licenses/>.
+
 import functools
 import math
 import numbers
@@ -56,23 +73,23 @@ class Polyhedron(Domain):
 
     @property
     def equalities(self):
-    """
-    Return a list of the equalities in a set.
-    """
+        """
+        Return a list of the equalities in a set.
+        """
         return self._equalities
 
     @property
     def inequalities(self):
-    """
-    Return a list of the inequalities in a set.
-    """
+        """
+        Return a list of the inequalities in a set.
+        """
         return self._inequalities
 
     @property
     def constraints(self):
-    """
-    Return ta list of the constraints of a set.
-    """
+        """
+        Return ta list of the constraints of a set.
+        """
         return self._constraints
 
     @property
@@ -115,9 +132,10 @@ class Polyhedron(Domain):
         return True
 
     def subs(self, symbol, expression=None):
-    """
-    Subsitute the given value into an expression and return the resulting expression.
-    """
+        """
+        Subsitute the given value into an expression and return the resulting
+        expression.
+        """
         equalities = [equality.subs(symbol, expression)
             for equality in self.equalities]
         inequalities = [inequality.subs(symbol, expression)
@@ -242,18 +260,18 @@ class Polyhedron(Domain):
 
     @classmethod
     def fromsympy(cls, expr):
-    """
-    Convert a sympy object to an expression.
-    """
+        """
+        Convert a sympy object to an expression.
+        """
         domain = Domain.fromsympy(expr)
         if not isinstance(domain, Polyhedron):
             raise ValueError('non-polyhedral expression: {!r}'.format(expr))
         return domain
 
     def tosympy(self):
-    """
-    Return an expression as a sympy object. 
-    """
+        """
+        Return an expression as a sympy object.
+        """
         import sympy
         constraints = []
         for equality in self.equalities:
@@ -262,6 +280,7 @@ class Polyhedron(Domain):
             constraints.append(sympy.Ge(inequality.tosympy(), 0))
         return sympy.And(*constraints)
 
+
 class EmptyType(Polyhedron):
 
     __slots__ = Polyhedron.__slots__
@@ -370,4 +389,3 @@ def Ge(left, right):
     Assert first set is greater than or equal to the second set.
     """
     return Polyhedron([], [left - right])
-