X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Flib%2Farith.ma;h=6cbf869858e1d984d92a4233e7f78f504f63bdd2;hb=3c7b4071a9ac096b02334c1d47468776b948e2de;hp=e11ea724d9ae4fcad88dd1464579af9d83721b75;hpb=68b4f2490c12139c03760b39895619e63b0f38c9;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/lib/arith.ma b/matita/matita/contribs/lambdadelta/ground/lib/arith.ma
index e11ea724d..6cbf86985 100644
--- a/matita/matita/contribs/lambdadelta/ground/lib/arith.ma
+++ b/matita/matita/contribs/lambdadelta/ground/lib/arith.ma
@@ -12,6 +12,7 @@
 (*                                                                        *)
 (**************************************************************************)
 
+include "basics/core_notation/exp_2.ma".
 include "arithmetics/nat.ma".
 include "ground/xoa/ex_3_1.ma".
 include "ground/xoa/or_3.ma".