update in lib

[helm.git] / matita / matita / lib / tutorial / chapter5.ma

diff --git a/matita/matita/lib/tutorial/chapter5.ma b/matita/matita/lib/tutorial/chapter5.ma
index 21a8abd2fcc515d169a2dca0335ab3136497da8f..b1493982ce9fea0bc002020a84c733e766454dc8 100644 (file)
--- a/matita/matita/lib/tutorial/chapter5.ma
+++ b/matita/matita/lib/tutorial/chapter5.ma
@@ -4,7 +4,7 @@
 
 include "tutorial/chapter4.ma".
 include "arithmetics/nat.ma".
-
+include "basics/core_notation/card_1.ma".
 
 (******************************** Option Type *********************************)