update in standard library

[helm.git] / matita / matita / lib / formal_topology / categories.ma

diff --git a/matita/matita/lib/formal_topology/categories.ma b/matita/matita/lib/formal_topology/categories.ma
index 02605e4a87da4ab6491c1ff9467311d76db311b5..94a8d22ebb6f69dd64c249677e30c74ee7fdb9d3 100644 (file)
--- a/matita/matita/lib/formal_topology/categories.ma
+++ b/matita/matita/lib/formal_topology/categories.ma
@@ -14,6 +14,7 @@
 
 include "formal_topology/cprop_connectives.ma".
 include "basics/core_notation/compose_2.ma".
+include "basics/core_notation/invert_1.ma".
 
 inductive eq (A:Type[0]) (x:A) : A → CProp[0] ≝
     refl: eq A x x.