Added debugging option to ask for all disambiguation errors (even spurious ones)...

[helm.git] / helm / software / matita / dama_didactic / deriv.ma

diff --git a/helm/software/matita/dama_didactic/deriv.ma b/helm/software/matita/dama_didactic/deriv.ma
index 201471c456ff86245d4c5d9ebc5f443172bc6872..9619b94ba2b83d46b93cf122254d8e01e1ca42a2 100644 (file)
--- a/helm/software/matita/dama_didactic/deriv.ma
+++ b/helm/software/matita/dama_didactic/deriv.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).