X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fdama_didactic%2Fderiv.ma;h=5c2e734c0697037a686f42c3257b25f377a23635;hb=10f29fdd78ee089a9a94446207b543d33d6c851c;hp=201471c456ff86245d4c5d9ebc5f443172bc6872;hpb=87bfe7fa6c7b906646a0094180e69c0b0373ce10;p=helm.git

diff --git a/helm/software/matita/dama_didactic/deriv.ma b/helm/software/matita/dama_didactic/deriv.ma
index 201471c45..5c2e734c0 100644
--- a/helm/software/matita/dama_didactic/deriv.ma
+++ b/helm/software/matita/dama_didactic/deriv.ma
@@ -12,7 +12,7 @@
 (*                                                                        *)
 (**************************************************************************)
 
-set "baseuri" "cic:/matita/didactic/deriv".
+
 
 include "reals.ma".
 
@@ -110,3 +110,5 @@ for @{ 'elev $a $b }.
  
 interpretation "function power" 'elev x y =
  (cic:/matita/didactic/deriv/felev.con x y). 
+
+axiom tech1: ∀n,m. F_OF_nat n + F_OF_nat m = F_OF_nat (n + m).