X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Flib%2Fformal_topology%2Fcategories.ma;h=02605e4a87da4ab6491c1ff9467311d76db311b5;hb=b5cb5cc7230870f757aadbe6b43ee146fe485a6d;hp=5643e2f6b623b5605aa28cd2b5303038d3e8d89e;hpb=38b251338be469c7bcd75cb9f243fad9ba8f0907;p=helm.git

diff --git a/matita/matita/lib/formal_topology/categories.ma b/matita/matita/lib/formal_topology/categories.ma
index 5643e2f6b..02605e4a8 100644
--- a/matita/matita/lib/formal_topology/categories.ma
+++ b/matita/matita/lib/formal_topology/categories.ma
@@ -13,6 +13,7 @@
 (**************************************************************************)
 
 include "formal_topology/cprop_connectives.ma".
+include "basics/core_notation/compose_2.ma".
 
 inductive eq (A:Type[0]) (x:A) : A → CProp[0] ≝
     refl: eq A x x.
@@ -525,4 +526,4 @@ notation > "r⎻*" non associative with precedence 90 for @{'OR_f_minus_star $r}
 
 notation "r \sup ⎻" non associative with precedence 90 for @{'OR_f_minus $r}.
 notation > "r⎻" non associative with precedence 90 for @{'OR_f_minus $r}.
-*)
\ No newline at end of file
+*)