X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fground%2Flib%2Fltc_ctc.ma;h=e6fcccec6a103586dd91cf17229a75eafc15d268;hp=54b1117b6260d007a2258dae9f54eb19663683e8;hb=ae626612bff9c3746dd7647bbada791c737e348c;hpb=4d232392091ee233afc26ecf3120dd5f5c6a33c8

diff --git a/matita/matita/contribs/lambdadelta/ground/lib/ltc_ctc.ma b/matita/matita/contribs/lambdadelta/ground/lib/ltc_ctc.ma
index 54b1117b6..e6fcccec6 100644
--- a/matita/matita/contribs/lambdadelta/ground/lib/ltc_ctc.ma
+++ b/matita/matita/contribs/lambdadelta/ground/lib/ltc_ctc.ma
@@ -15,11 +15,11 @@
 include "ground/lib/star.ma".
 include "ground/lib/ltc.ma".
 
-(* LABELLED TRANSITIVE CLOSURE **********************************************)
+(* LABELLED TRANSITIVE CLOSURE FOR RELATIONS ********************************)
 
-alias symbol "subseteq" = "relation inclusion". (**)
+alias symbol "subseteq" = "relation inclusion". (* * alias *)
 
-(* Constructions with contextual transitive closure *************************)
+(* Constructions with ctc ***************************************************)
 
 lemma ltc_CTC (C) (A) (i) (f) (B) (R:relation4 C A B B):
               left_identity … f i →
@@ -28,7 +28,7 @@ lemma ltc_CTC (C) (A) (i) (f) (B) (R:relation4 C A B B):
 #b #b2 #_ #Hb2 #IH >(Hf i) -Hf /2 width=3 by ltc_dx/
 qed.
 
-(* Inversions with contextual transitive closure ****************************)
+(* Inversions with ctc ******************************************************)
 
 lemma ltc_inv_CTC (C) (A) (i) (f) (B) (R:relation4 C A B B):
                   associative … f → annulment_2 … f i →