Set_object.cardinality: Check category

sagemath · Aug 19, 2022 · 970d467 · 970d467
1 parent e63e4f0
commit 970d467
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/sage/sets/set.py b/src/sage/sets/set.py
@@ -676,6 +676,9 @@ def cardinality(self):
             sage: Set(GF(5^2,'a')).cardinality()
             25
         """
+        if self in Sets().Infinite():
+            return sage.rings.infinity.infinity
+
         if not self.is_finite():
             return sage.rings.infinity.infinity