decentralizing core notation

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

diff --git a/matita/matita/lib/formal_topology/relations.ma b/matita/matita/lib/formal_topology/relations.ma
index 2d5d85a6be9a1dc0cca55b46d702694b655712a8..3516999008aa714be19b99bf19b068dc585881dc 100644 (file)
--- a/matita/matita/lib/formal_topology/relations.ma
+++ b/matita/matita/lib/formal_topology/relations.ma
@@ -12,6 +12,7 @@
 (*                                                                        *)
 (**************************************************************************)
 
+include "basics/core_notation/comprehension_2.ma".
 include "formal_topology/subsets.ma".
 (*
 record binary_relation (A,B: SET) : Type[1] ≝