X-Git-Url: https://scm.cri.ensmp.fr/git/linpy.git/blobdiff_plain/cd2197879049a836b02a331adf0a00c0b87fe043..51e97eade63b2f4c7b500feb503436cc4a886e59:/examples/squares.py

diff --git a/examples/squares.py b/examples/squares.py
index 4389d87..1df6e3d 100755
--- a/examples/squares.py
+++ b/examples/squares.py
@@ -1,5 +1,22 @@
 #!/usr/bin/env python3
 
+"""
+    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/>.
+"""
+
 from pypol import *
 
 a, x, y, z = symbols('a x y z')
@@ -9,8 +26,11 @@ sq2 = Le(2, x) & Le(x, 4) & Le(2, y) & Le(y, 4)
 sq3 = Le(0, x) & Le(x, 3) & Le(0, y) & Le(y, 3)
 sq4 = Le(1, x) & Le(x, 2) & Le(1, y) & Le(y, 2)
 sq5 = Le(1, x) & Le(x, 2) & Le(1, y)
-sq6 = Le(1, x) & Le(x, 2) & Le(1, y) & Eq(y, 3)
+sq6 = Le(1, x) & Le(x, 2) & Le(1, y) & Le(y, 3)
 sq7 = Le(0, x) & Le(x, 2) & Le(0, y) & Eq(z, 2) & Le(a, 3)
+p = Le(2*x+1, y) & Le(-2*x-1, y) & Le(y, 1)
+
+
 universe = Polyhedron([])
 q = sq1 - sq2
 e = Empty
@@ -69,3 +89,9 @@ print()
 print('sq1 has {} parameters'.format(sq1.num_parameters()))
 print()
 print('does sq1 constraints involve x?', sq1.involves_dims([x]))
+print()
+print('the verticies for s are:', p.vertices())
+print()
+print(p.plot())
+
+# Copyright 2014 MINES ParisTech