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diff --git a/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_uni.ma b/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_uni.ma
index 34421d67a..2763d9a40 100644
--- a/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_uni.ma
+++ b/matita/matita/contribs/lambdadelta/ground/relocation/gr_isi_uni.ma
@@ -15,15 +15,15 @@
 include "ground/relocation/gr_uni.ma".
 include "ground/relocation/gr_isi_id.ma".
 
-(* IDENTITY CONDITION FOR GENERIC RELOCATION MAPS ***********************************************************)
+(* IDENTITY CONDITION FOR GENERIC RELOCATION MAPS ***************************)
 
-(* Properties with test for identity ****************************************)
+(* Constructions with gr_isi ************************************************)
 
 (*** uni_inv_isid uni_isi *)
 lemma gr_uni_isi (f): 𝐮❨𝟎❩ ≡ f → 𝐈❪f❫.
 /2 width=1 by gr_eq_id_isi/ qed.
 
-(* Inversion lemmas with test for identity **********************************)
+(* Inversions with gr_isi ***************************************************)
 
 (*** uni_isid isi_inv_uni *)
 lemma gr_isi_inv_uni (f): 𝐈❪f❫ → 𝐮❨𝟎❩ ≡ f.