X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=sidebyside;f=helm%2Fsoftware%2Fmatita%2Fnlibrary%2Ftopology%2Fcantor.ma;h=d3dccb8ee07e66248e17e69f21536cc6fb3013fe;hb=e7264f953fcf2cd2bef9057d83add08996d2ce75;hp=fd300462e918aeecc8add2b9b358a81614a278cf;hpb=60c92de1ace192d20b818bd71ec420d74e0176d2;p=helm.git

diff --git a/helm/software/matita/nlibrary/topology/cantor.ma b/helm/software/matita/nlibrary/topology/cantor.ma
index fd300462e..d3dccb8ee 100644
--- 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.