attempt to fix 32269

sagemath · Jul 23, 2021 · 96561b3 · 96561b3
1 parent f5efe48
commit 96561b3
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/src/sage/schemes/elliptic_curves/isogeny_small_degree.py b/src/sage/schemes/elliptic_curves/isogeny_small_degree.py
@@ -2333,6 +2333,13 @@ def isogenies_prime_degree(E, l, minimal_models=True):
         []
         sage: E.isogenies_prime_degree(73) # slower (2s)
         []
+
+    Test that :trac:`32269` is fixed.
+
+        sage: K = QuadraticField(-11)
+        sage: E = EllipticCurve(K, [0,1,0,-117,-541])
+        sage: E.isogenies_prime_degree(37)
+
     """
     if not l.is_prime():
         raise ValueError("%s is not prime."%l)
@@ -2352,7 +2359,7 @@ def isogenies_prime_degree(E, l, minimal_models=True):
         return isogenies_prime_degree_genus_plus_0(E,l, minimal_models=minimal_models)
 
     j = E.j_invariant()
-    if j in QQ:
+    if j in QQ and E.base_field() is QQ:
         j = QQ(j)
         if j in sporadic_j:
             return isogenies_sporadic_Q(E,l, minimal_models=minimal_models)