(* Advanced properties ******************************************************)
-lemma tc_lfxs_refl: ∀R. (∀L. reflexive … (R L)) → ∀T. reflexive … (tc_lfxs R T).
+lemma tc_lfxs_refl: ∀R. c_reflexive … R →
+ ∀T. reflexive … (tc_lfxs R T).
/3 width=1 by lfxs_refl, inj/ qed.
(* Basic_2A1: uses: TC_lpx_sn_pair TC_lpx_sn_pair_refl *)
-lemma tc_lfxs_pair_refl: ∀R. (∀L. reflexive … (R L)) →
+lemma tc_lfxs_pair_refl: ∀R. c_reflexive … R →
∀L,V1,V2. LTC … R L V1 V2 → ∀I,T. L.ⓑ{I}V1 ⪤**[R, T] L.ⓑ{I}V2.
#R #HR #L #V1 #V2 #H elim H -V2
/3 width=3 by tc_lfxs_step_dx, lfxs_pair_refl, inj/
(* Advanced eliminators *****************************************************)
-lemma tc_lfxs_ind_sn: ∀R. (∀L. reflexive … (R L)) →
+lemma tc_lfxs_ind_sn: ∀R. c_reflexive … R →
∀L1,T. ∀R0:predicate …. R0 L1 →
(∀L,L2. L1 ⪤**[R, T] L → L ⪤*[R, T] L2 → R0 L → R0 L2) →
∀L2. L1 ⪤**[R, T] L2 → R0 L2.
@(TC_star_ind … HL1 IHL1 … HL12) /2 width=1 by lfxs_refl/
qed-.
-lemma tc_lfxs_ind_dx: ∀R. (∀L. reflexive … (R L)) →
+lemma tc_lfxs_ind_dx: ∀R. c_reflexive … R →
∀L2,T. ∀R0:predicate …. R0 L2 →
(∀L1,L. L1 ⪤*[R, T] L → L ⪤**[R, T] L2 → R0 L → R0 L1) →
∀L1. L1 ⪤**[R, T] L2 → R0 L1.
(* Advanced inversion lemmas ************************************************)
-lemma tc_lfxs_inv_bind_void: ∀R. (∀L. reflexive … (R L)) →
+lemma tc_lfxs_inv_bind_void: ∀R. c_reflexive … R →
∀p,I,L1,L2,V,T. L1 ⪤**[R, ⓑ{p,I}V.T] L2 →
L1 ⪤**[R, V] L2 ∧ L1.ⓧ ⪤**[R, T] L2.ⓧ.
#R #HR #p #I #L1 #L2 #V #T #H @(tc_lfxs_ind_sn … HR … H) -L2
(* Advanced forward lemmas **************************************************)
-lemma tc_lfxs_fwd_bind_dx_void: ∀R. (∀L. reflexive … (R L)) →
+lemma tc_lfxs_fwd_bind_dx_void: ∀R. c_reflexive … R →
∀p,I,L1,L2,V,T. L1 ⪤**[R, ⓑ{p,I}V.T] L2 →
L1.ⓧ ⪤**[R, T] L2.ⓧ.
#R #HR #p #I #L1 #L2 #V #T #H elim (tc_lfxs_inv_bind_void … H) -H //