fixes sympy#24394

1e9abhi1e10 · Dec 16, 2022 · 1cc99a1 · 1cc99a1
1 parent e4c27fa
commit 1cc99a1
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/sympy/polys/polytools.py b/sympy/polys/polytools.py
@@ -40,6 +40,7 @@
     PolificationFailed,
     ComputationFailed,
     GeneratorsError,
+    NotInvertible,
 )
 from sympy.polys.polyutils import (
     basic_from_dict,
@@ -2589,7 +2590,8 @@ def invert(f, g, auto=True):
 
         """
         dom, per, F, G = f._unify(g)
-
+        if G.degree() < 1:
+            raise NotInvertible('constant modulus in polynomial ring')
         if auto and dom.is_Ring:
             F, G = F.to_field(), G.to_field()