X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Fcounters%2Frtc_ist_plus.ma;h=ce43fe2dc50c2e619b017c050042e9f3a5ee57e5;hb=2e4a7c54ef77c10cb1cef4b59518c473245ea935;hp=5156acb85e3c34bcc2a6d39b780fc3ba2e31cc17;hpb=0bcf2dc1a27e38cb6cd3d44eb838d652926841e0;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/counters/rtc_ist_plus.ma b/matita/matita/contribs/lambdadelta/ground/counters/rtc_ist_plus.ma
index 5156acb85..ce43fe2dc 100644
--- a/matita/matita/contribs/lambdadelta/ground/counters/rtc_ist_plus.ma
+++ b/matita/matita/contribs/lambdadelta/ground/counters/rtc_ist_plus.ma
@@ -20,27 +20,27 @@ include "ground/counters/rtc_ist.ma".
 
 (* Constructions with rtc_plus **********************************************)
 
-lemma rtc_ist_plus (n1) (n2) (c1) (c2): 𝐓❪n1,c1❫ → 𝐓❪n2,c2❫ → 𝐓❪n1+n2,c1+c2❫.
+lemma rtc_ist_plus (n1) (n2) (c1) (c2): 𝐓❨n1,c1❩ → 𝐓❨n2,c2❩ → 𝐓❨n1+n2,c1+c2❩.
 #n1 #n2 #c1 #c2 #H1 #H2 destruct //
 qed.
 
-lemma rtc_ist_plus_zero_sn (n) (c1) (c2): 𝐓❪𝟎,c1❫ → 𝐓❪n,c2❫ → 𝐓❪n,c1+c2❫.
+lemma rtc_ist_plus_zero_sn (n) (c1) (c2): 𝐓❨𝟎,c1❩ → 𝐓❨n,c2❩ → 𝐓❨n,c1+c2❩.
 #n #c1 #c2 #H1 #H2 >(nplus_zero_sn n)
 /2 width=1 by rtc_ist_plus/
 qed.
 
-lemma rtc_ist_plus_zero_dx (n) (c1) (c2): 𝐓❪n,c1❫ → 𝐓❪𝟎,c2❫ → 𝐓❪n,c1+c2❫.
+lemma rtc_ist_plus_zero_dx (n) (c1) (c2): 𝐓❨n,c1❩ → 𝐓❨𝟎,c2❩ → 𝐓❨n,c1+c2❩.
 /2 width=1 by rtc_ist_plus/ qed.
 
-lemma rtc_ist_succ (n) (c): 𝐓❪n,c❫ → 𝐓❪↑n,c+𝟘𝟙❫.
+lemma rtc_ist_succ (n) (c): 𝐓❨n,c❩ → 𝐓❨↑n,c+𝟘𝟙❩.
 #n #c #H >nplus_unit_dx
 /2 width=1 by rtc_ist_plus/
 qed.
 
 (* Inversions with rtc_plus *************************************************)
 
-lemma rtc_ist_inv_plus (n) (c1) (c2): 𝐓❪n,c1 + c2❫ →
-      ∃∃n1,n2. 𝐓❪n1,c1❫ & 𝐓❪n2,c2❫ & n1 + n2 = n.
+lemma rtc_ist_inv_plus (n) (c1) (c2): 𝐓❨n,c1 + c2❩ →
+      ∃∃n1,n2. 𝐓❨n1,c1❩ & 𝐓❨n2,c2❩ & n1 + n2 = n.
 #n #c1 #c2 #H
 elim (rtc_plus_inv_dx … H) -H #ri1 #rs1 #ti1 #ts1 #ri2 #rs2 #ti2 #ts2 #H1 #H2 #H3 #H4 #H5 #H6 destruct
 elim (eq_inv_nplus_zero … H1) -H1 #H11 #H12 destruct
@@ -49,20 +49,20 @@ elim (eq_inv_nplus_zero … H3) -H3 #H31 #H32 destruct
 /3 width=5 by ex3_2_intro/
 qed-.
 
-lemma rtc_ist_inv_plus_zero_dx (n) (c1) (c2): 𝐓❪n,c1 + c2❫ → 𝐓❪𝟎,c2❫ → 𝐓❪n,c1❫.
+lemma rtc_ist_inv_plus_zero_dx (n) (c1) (c2): 𝐓❨n,c1 + c2❩ → 𝐓❨𝟎,c2❩ → 𝐓❨n,c1❩.
 #n #c1 #c2 #H #H2
 elim (rtc_ist_inv_plus … H) -H #n1 #n2 #Hn1 #Hn2 #H destruct //
 qed-.
 
 lemma rtc_ist_inv_plus_unit_dx:
-      ∀n,c1,c2. 𝐓❪n,c1 + c2❫ → 𝐓❪𝟏,c2❫ →
-      ∃∃m. 𝐓❪m,c1❫ & n = ↑m.
+      ∀n,c1,c2. 𝐓❨n,c1 + c2❩ → 𝐓❨𝟏,c2❩ →
+      ∃∃m. 𝐓❨m,c1❩ & n = ↑m.
 #n #c1 #c2 #H #H2 destruct
 elim (rtc_ist_inv_plus … H) -H #n1 #n2 #Hn1 #Hn2 #H destruct
 /2 width=3 by ex2_intro/
 qed-.
 
-lemma rtc_ist_inv_plus_zu_dx (n) (c): 𝐓❪n,c+𝟙𝟘❫ → ⊥.
+lemma rtc_ist_inv_plus_zu_dx (n) (c): 𝐓❨n,c+𝟙𝟘❩ → ⊥.
 #n #c #H
 elim (rtc_ist_inv_plus … H) -H #n1 #n2 #_ #H #_
 /2 width=2 by rtc_ist_inv_uz/