X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Frelocation%2Fgr_coafter.ma;h=2ec6991cf31f9e9f4ce6d2063ef847dbba8f8a6e;hb=8bbe582d87984526f40182c4409cbfd43108cb79;hp=8c730547fd1f8ca6123844ee1863e0dedb566c6d;hpb=55c768d7e45babb300b5010463ba3196a68f1bbe;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/gr_coafter.ma b/matita/matita/contribs/lambdadelta/ground/relocation/gr_coafter.ma
index 8c730547f..2ec6991cf 100644
--- a/matita/matita/contribs/lambdadelta/ground/relocation/gr_coafter.ma
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/gr_coafter.ma
@@ -16,7 +16,7 @@ include "ground/notation/relations/rcoafter_3.ma".
 include "ground/xoa/ex_3_2.ma".
 include "ground/relocation/gr_tl.ma".
 
-(* RELATIONAL CO-COMPOSITION FOR GENERIC RELOCATION MAPS ***********************************************************)
+(* RELATIONAL CO-COMPOSITION FOR GENERIC RELOCATION MAPS ********************)
 
 (*** coafter *)
 coinductive gr_coafter: relation3 gr_map gr_map gr_map ≝
@@ -35,7 +35,7 @@ interpretation
   "relational co-composition (generic relocation maps)"
   'RCoAfter f1 f2 f = (gr_coafter f1 f2 f).
 
-(* Basic inversion lemmas ***************************************************)
+(* Basic inversions *********************************************************)
 
 (*** coafter_inv_ppx *)
 lemma gr_coafter_inv_push_bi:
@@ -82,7 +82,7 @@ lemma gr_coafter_inv_next_sn:
 ]
 qed-.
 
-(* Advanced inversion lemmas ************************************************)
+(* Advanced inversions ******************************************************)
 
 (*** coafter_inv_ppp *)
 lemma gr_coafter_inv_push_bi_push:
@@ -213,26 +213,26 @@ elim (gr_map_split_tl g2) #H2
 ]
 qed-.
 
-(* Inversion lemmas with tail ***********************************************)
+(* Inversions with gr_tl ****************************************************)
 
 (*** coafter_inv_tl1 *)
 lemma gr_coafter_inv_tl_dx:
-      ∀g2,g1,g. g2 ~⊚ ⫱g1 ≘ g →
-      ∃∃f. ⫯g2 ~⊚ g1 ≘ f & ⫱f = g.
+      ∀g2,g1,g. g2 ~⊚ ⫰g1 ≘ g →
+      ∃∃f. ⫯g2 ~⊚ g1 ≘ f & ⫰f = g.
 #g2 #g1 #g
 elim (gr_map_split_tl g1) #H1 #H2
 [ /3 width=7 by gr_coafter_refl, ex2_intro/
-| @(ex2_intro … (↑g)) /2 width=7 by gr_coafter_push/ (**) (* full auto fails *)
+| @(ex2_intro … (↑g)) /2 width=7 by gr_coafter_push/ (* * full auto fails *)
 ]
 qed-.
 
 (*** coafter_inv_tl0 *)
 lemma gr_coafter_inv_tl:
-      ∀g2,g1,g. g2 ~⊚ g1 ≘ ⫱g →
-      ∃∃f1. ⫯g2 ~⊚ f1 ≘ g & ⫱f1 = g1.
+      ∀g2,g1,g. g2 ~⊚ g1 ≘ ⫰g →
+      ∃∃f1. ⫯g2 ~⊚ f1 ≘ g & ⫰f1 = g1.
 #g2 #g1 #g
 elim (gr_map_split_tl g) #H1 #H2
 [ /3 width=7 by gr_coafter_refl, ex2_intro/
-| @(ex2_intro … (↑g1)) /2 width=7 by gr_coafter_push/ (**) (* full auto fails *)
+| @(ex2_intro … (↑g1)) /2 width=7 by gr_coafter_push/ (* * full auto fails *)
 ]
 qed-.