X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Fcontribs%2FRELATIONAL%2FZEq%2Fsetoid.ma;h=03075bb75818909371091eaeec06d4178d59eafc;hb=d9824956d9132109ed5f23380a0a1f9c5181d18a;hp=587470bfc70f9af0374199523a390485589f7f4d;hpb=5c1b44dfefa085fbb56e23047652d3650be9d855;p=helm.git

diff --git a/helm/software/matita/contribs/RELATIONAL/ZEq/setoid.ma b/helm/software/matita/contribs/RELATIONAL/ZEq/setoid.ma
index 587470bfc..03075bb75 100644
--- a/helm/software/matita/contribs/RELATIONAL/ZEq/setoid.ma
+++ b/helm/software/matita/contribs/RELATIONAL/ZEq/setoid.ma
@@ -17,14 +17,14 @@
 include "NPlus/fun.ma".
 include "ZEq/defs.ma".
 
-theorem zeq_refl: \forall z. z = z.
- intros. elim z. clear z.
- lapply (nplus_total t t1). decompose.
+theorem zeq_refl: ∀z. z ≈ z.
+ intros; elim z. clear z.
+ lapply (nplus_total a b); decompose;
  autobatch.
 qed.
 
-theorem zeq_sym: \forall z1,z2. z1 = z2 \to z2 = z1.
- intros. elim H. clear H z1 z2. autobatch.
+theorem zeq_sym: ∀z1,z2. z1 ≈ z2 → z2 ≈ z1.
+ intros; elim H; clear H z1 z2; autobatch.
 qed.
 (*
 theorem zeq_trans: \forall z1,z2. z1 = z2 \to