X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Flib%2Fformal_topology%2Fsubsets.ma;h=56c2c895cbb98d2495b099e88c919792481075d2;hb=b5cb5cc7230870f757aadbe6b43ee146fe485a6d;hp=5cb8455a07b80d5df624ba5728d0c5792982968d;hpb=38b251338be469c7bcd75cb9f243fad9ba8f0907;p=helm.git

diff --git a/matita/matita/lib/formal_topology/subsets.ma b/matita/matita/lib/formal_topology/subsets.ma
index 5cb8455a0..56c2c895c 100644
--- a/matita/matita/lib/formal_topology/subsets.ma
+++ b/matita/matita/lib/formal_topology/subsets.ma
@@ -13,6 +13,8 @@
 (**************************************************************************)
 
 include "formal_topology/categories.ma".
+include "basics/core_notation/singl_1.ma".
+include "basics/core_notation/subset_1.ma".
 (*
 record powerset_carrier (A: objs1 SET) : Type[1] ≝ { mem_operator: A ⇒_1 CPROP }.
 interpretation "powerset low" 'powerset A = (powerset_carrier A).