Default commit message, part of an automated flow.

categories.md

@@ -0,0 +1,11 @@
+# categories
+
+- a [[list]].
+  - [[pull]] [[category]]
+  - [[Set]]
+    - [[sets]] and [[set functions]]
+  - [[Ring]]
+    - [[rings]] and [[ring homomorphisms]]
+  - [[Top]]
+    - [[topological spaces]] and [[continuous maps]]
+

category.md

@@ -1,5 +1,8 @@
 # category
 
-- [[wp]] https://en.wikipedia.org/wiki/Category_(mathematics)
-  - [[go]] [[wp]]
+- a [[thing]].
+  - [[pull]] [[categories]] [[category theory]]
+  - [[collection]] of [[objects]] and [[morphisms]].
+  - [[wp]] https://en.wikipedia.org/wiki/Category_(mathematics)
+    - [[go]] [[wp]]