X-Git-Url: https://scm.cri.mines-paristech.fr/git/linpy.git/blobdiff_plain/b77f3f44c4b15fbe2965b206bf74021377a8876a..23922aa39e585f1e6b11f3479da002c92bebf2a1:/linpy/polyhedra.py

diff --git a/linpy/polyhedra.py b/linpy/polyhedra.py
index ead9b83..820b014 100644
--- a/linpy/polyhedra.py
+++ b/linpy/polyhedra.py
@@ -222,6 +222,10 @@ class Polyhedron(Domain):
 
     @classmethod
     def _fromislbasicset(cls, islbset, symbols):
+        if bool(libisl.isl_basic_set_is_empty(islbset)):
+            return Empty
+        if bool(libisl.isl_basic_set_is_universe(islbset)):
+            return Universe
         islconstraints = islhelper.isl_basic_set_constraints(islbset)
         equalities = []
         inequalities = []