Not is now inductive.

[helm.git] / helm / software / matita / nlibrary / topology / cantor.ma

diff --git a/helm/software/matita/nlibrary/topology/cantor.ma b/helm/software/matita/nlibrary/topology/cantor.ma
index fd300462e918aeecc8add2b9b358a81614a278cf..d3dccb8ee07e66248e17e69f21536cc6fb3013fe 100644 (file)
--- a/helm/software/matita/nlibrary/topology/cantor.ma
+++ b/helm/software/matita/nlibrary/topology/cantor.ma
@@ -41,7 +41,7 @@ ntheorem th2_3 :
   ∀A:Ax.∀a:A. a ◃ ∅ → ∃i. ¬ a ∈ 𝐂 a i.
 #A; #a; #H; nelim H;
 ##[ #n; *;
-##| #b; #i_star; #IH1; #IH2; ncases (EM … b i_star); /2/;
+##| #b; #i_star; #IH1; #IH2; ncases (EM … b i_star); /3/;
 ##] 
 nqed.