update in gruound

[helm.git] / matita / matita / contribs / lambdadelta / ground / lib / ltc_ctc.ma

diff --git a/matita/matita/contribs/lambdadelta/ground/lib/ltc_ctc.ma b/matita/matita/contribs/lambdadelta/ground/lib/ltc_ctc.ma
index 54b1117b6260d007a2258dae9f54eb19663683e8..e6fcccec6a103586dd91cf17229a75eafc15d268 100644 (file)
--- 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 →