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diff --git a/matita/matita/contribs/lambdadelta/static_2/static/fsle_fqup.ma b/matita/matita/contribs/lambdadelta/static_2/static/fsle_fqup.ma
index 242c3d52c..7965876e2 100644
--- a/matita/matita/contribs/lambdadelta/static_2/static/fsle_fqup.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/static/fsle_fqup.ma
@@ -33,7 +33,7 @@ lemma fsle_shift: ∀L1,L2. |L1| = |L2| →
 elim (lveq_inj_length … H2L) // -H1L #H1 #H2 destruct
 lapply (lveq_inv_bind_O … H2L) -H2L #HL
 elim (frees_total L2 V) #g1 #Hg1
-elim (sor_isfin_ex g1 (⫱g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
+elim (sor_isfin_ex g1 (â«°g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
 lapply (sor_inv_sle_dx … Hg) #H0g
 /4 width=10 by frees_bind, lveq_void_sn, sle_tl, sle_trans, ex4_4_intro/
 qed.
@@ -42,7 +42,7 @@ lemma fsle_bind_dx_sn: ∀L1,L2,V1,V2. ❪L1,V1❫ ⊆ ❪L2,V2❫ →
                        ∀p,I,T2. ❪L1,V1❫ ⊆ ❪L2,ⓑ[p,I]V2.T2❫.
 #L1 #L2 #V1 #V2 * #n1 #m1 #f1 #g1 #Hf1 #Hg1 #HL12 #Hfg1 #p #I #T2
 elim (frees_total (L2.ⓧ) T2) #g2 #Hg2
-elim (sor_isfin_ex g1 (⫱g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
+elim (sor_isfin_ex g1 (â«°g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
 @(ex4_4_intro … g Hf1 … HL12) (**) (* full auto too slow *)
 /4 width=5 by frees_bind_void, sor_inv_sle_sn, sor_tls, sle_trans/
 qed.
@@ -53,7 +53,7 @@ lemma fsle_bind_dx_dx: ∀L1,L2,T1,T2. ❪L1,T1❫ ⊆ ❪L2.ⓧ,T2❫ → |L1|
 elim (lveq_inv_void_dx_length … H HL12) -H -HL12 #m1 #HL12 #H1 #H2 destruct
 <tls_xn in Hfg2; #Hfg2
 elim (frees_total L2 V2) #g1 #Hg1
-elim (sor_isfin_ex g1 (⫱g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
+elim (sor_isfin_ex g1 (â«°g2)) /3 width=3 by frees_fwd_isfin, isfin_tl/ #g #Hg #_
 @(ex4_4_intro … g Hf2 … HL12) (**) (* full auto too slow *)
 /4 width=5 by frees_bind_void, sor_inv_sle_dx, sor_tls, sle_trans/
 qed.