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Author: user202729

src/sage/rings/number_field/number_field.py

@@ -8780,41 +8780,9 @@ def subfields(self, degree=0, name=None):
         polynomials are supported (:issue:`252`)::
 
             sage: K.<a> = NumberField(2*x^4 + 6*x^2 + 1/2)
-            sage: l = K.subfields(); l  # random (see :issue:`39153`)
-            [(Number Field in a0 with defining polynomial x,
-              Ring morphism:
-                From: Number Field in a0 with defining polynomial x
-                To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
-                Defn: 0 |--> 0,
-              None),
-             (Number Field in a1 with defining polynomial x^2 - 2,
-              Ring morphism:
-                From: Number Field in a1 with defining polynomial x^2 - 2
-                To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
-                Defn: a1 |--> a^2 + 3/2,
-              None),
-             (Number Field in a2 with defining polynomial x^2 + 4,
-              Ring morphism:
-                From: Number Field in a2 with defining polynomial x^2 + 4
-                To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
-                Defn: a2 |--> 2*a^3 + 7*a,
-              None),
-             (Number Field in a3 with defining polynomial x^2 + 2,
-              Ring morphism:
-                From: Number Field in a3 with defining polynomial x^2 + 2
-                To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
-                Defn: a3 |--> 2*a^3 + 5*a,
-              None),
-             (Number Field in a4 with defining polynomial x^4 + 1,
-              Ring morphism:
-                From: Number Field in a4 with defining polynomial x^4 + 1
-                To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
-                Defn: a4 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4,
-              Ring morphism:
-                From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
-                To:   Number Field in a4 with defining polynomial x^4 + 1
-                Defn: a |--> -1/2*a4^3 + a4^2 - 1/2*a4)]
-            sage: sorted([F.discriminant() for F, _, _ in l])
+            sage: K
+            Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
+            sage: sorted([F.discriminant() for F, _, _ in K.subfields()])
             [-8, -4, 1, 8, 256]
         """
         return self._subfields_helper(degree=degree, name=name,