X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground_2%2Fsteps%2Frtc_plus.ma;h=6993f318d1c7176c7efef18da714a6562a6476ab;hp=49d25453c3d236dc1914d7e28ecf130cb15b498c;hb=bd53c4e895203eb049e75434f638f26b5a161a2b;hpb=3b7b8afcb429a60d716d5226a5b6ab0d003228b1

diff --git a/matita/matita/contribs/lambdadelta/ground_2/steps/rtc_plus.ma b/matita/matita/contribs/lambdadelta/ground_2/steps/rtc_plus.ma
index 49d25453c..6993f318d 100644
--- a/matita/matita/contribs/lambdadelta/ground_2/steps/rtc_plus.ma
+++ b/matita/matita/contribs/lambdadelta/ground_2/steps/rtc_plus.ma
@@ -58,38 +58,38 @@ qed.
 
 (* Properties with test for constrained rt-transition counter ***************)
 
-lemma isrt_plus: ân1,n2,c1,c2. ððâ¦n1,c1â¦ â ððâ¦n2,c2â¦ â ððâ¦n1+n2,c1+c2â¦.
+lemma isrt_plus: ân1,n2,c1,c2. ððâªn1,c1â« â ððâªn2,c2â« â ððâªn1+n2,c1+c2â«.
 #n1 #n2 #c1 #c2 * #ri1 #rs1 #H1 * #ri2 #rs2 #H2 destruct
 /2 width=3 by ex1_2_intro/
 qed.
 
-lemma isrt_plus_O1: ân,c1,c2. ððâ¦0,c1â¦ â ððâ¦n,c2â¦ â ððâ¦n,c1+c2â¦.
+lemma isrt_plus_O1: ân,c1,c2. ððâª0,c1â« â ððâªn,c2â« â ððâªn,c1+c2â«.
 /2 width=1 by isrt_plus/ qed.
 
-lemma isrt_plus_O2: ân,c1,c2. ððâ¦n,c1â¦ â ððâ¦0,c2â¦ â ððâ¦n,c1+c2â¦.
+lemma isrt_plus_O2: ân,c1,c2. ððâªn,c1â« â ððâª0,c2â« â ððâªn,c1+c2â«.
 #n #c1 #c2 #H1 #H2 >(plus_n_O n) /2 width=1 by isrt_plus/
 qed.
 
-lemma isrt_succ: ân,c. ððâ¦n,câ¦ â ððâ¦ân,c+ððâ¦.
+lemma isrt_succ: ân,c. ððâªn,câ« â ððâªân,c+ððâ«.
 /2 width=1 by isrt_plus/ qed.
 
 (* Inversion properties with test for constrained rt-transition counter *****)
 
-lemma isrt_inv_plus: ân,c1,c2. ððâ¦n,c1 + c2â¦ â
-                     âân1,n2. ððâ¦n1,c1â¦ & ððâ¦n2,c2â¦ & n1 + n2 = n.
+lemma isrt_inv_plus: ân,c1,c2. ððâªn,c1 + c2â« â
+                     âân1,n2. ððâªn1,c1â« & ððâªn2,c2â« & n1 + n2 = n.
 #n #c1 #c2 * #ri #rs #H
 elim (plus_inv_dx â¦ H) -H #ri1 #rs1 #ti1 #ts1 #ri2 #rs2 #ti2 #ts2 #_ #_ #H1 #H2 #H3 #H4
 elim (plus_inv_O3 â¦ H1) -H1 /3 width=5 by ex3_2_intro, ex1_2_intro/
 qed-.
 
-lemma isrt_inv_plus_O_dx: ân,c1,c2. ððâ¦n,c1 + c2â¦ â ððâ¦0,c2â¦ â ððâ¦n,c1â¦.
+lemma isrt_inv_plus_O_dx: ân,c1,c2. ððâªn,c1 + c2â« â ððâª0,c2â« â ððâªn,c1â«.
 #n #c1 #c2 #H #H2
 elim (isrt_inv_plus â¦ H) -H #n1 #n2 #Hn1 #Hn2 #H destruct
 lapply (isrt_inj â¦ Hn2 H2) -c2 #H destruct //
 qed-.
 
-lemma isrt_inv_plus_SO_dx: ân,c1,c2. ððâ¦n,c1 + c2â¦ â ððâ¦1,c2â¦ â
-                           ââm. ððâ¦m,c1â¦ & n = âm.
+lemma isrt_inv_plus_SO_dx: ân,c1,c2. ððâªn,c1 + c2â« â ððâª1,c2â« â
+                           ââm. ððâªm,c1â« & n = âm.
 #n #c1 #c2 #H #H2
 elim (isrt_inv_plus â¦ H) -H #n1 #n2 #Hn1 #Hn2 #H destruct
 lapply (isrt_inj â¦ Hn2 H2) -c2 #H destruct