- pipe graphviz markup to tred before generating png/map output to get rid of

[helm.git] / matita / contribs / RELATIONAL-ARITHMETICS / nat_defs.ma

diff --git a/matita/contribs/RELATIONAL-ARITHMETICS/nat_defs.ma b/matita/contribs/RELATIONAL-ARITHMETICS/nat_defs.ma
index 9b8ab4571ea42dab918013b786717e9fe22d6893..30d6cfb5ca1ae1e7dd4dcaafa2c8489f1ef1e89b 100644 (file)
--- a/matita/contribs/RELATIONAL-ARITHMETICS/nat_defs.ma
+++ b/matita/contribs/RELATIONAL-ARITHMETICS/nat_defs.ma
@@ -14,6 +14,8 @@
 
 set "baseuri" "cic:/matita/RELATIONAL-ARITHMETICS/nat_defs".
 
+include "logic/equality.ma".
+
 inductive nat: Set \def
    | O: nat
    | S: nat \to nat.