(* Constructions with rtc_shift *********************************************)
-lemma rtc_ist_zero_shift (c): ð\9d\90\93â\9dªð\9d\9f\8e,câ\9d« â\86\92 ð\9d\90\93â\9dªð\9d\9f\8e,â\86\95*câ\9d«.
+lemma rtc_ist_zero_shift (c): ð\9d\90\93â\9d¨ð\9d\9f\8e,câ\9d© â\86\92 ð\9d\90\93â\9d¨ð\9d\9f\8e,â\86\95*câ\9d©.
#c #H destruct //
qed.
(* Inversions with rtc_shift ************************************************)
-lemma rtc_ist_inv_shift (n) (c): ð\9d\90\93â\9dªn,â\86\95*câ\9d« â\86\92 â\88§â\88§ ð\9d\90\93â\9dªð\9d\9f\8e,câ\9d« & 𝟎 = n.
+lemma rtc_ist_inv_shift (n) (c): ð\9d\90\93â\9d¨n,â\86\95*câ\9d© â\86\92 â\88§â\88§ ð\9d\90\93â\9d¨ð\9d\9f\8e,câ\9d© & 𝟎 = n.
#n #c #H
elim (rtc_shift_inv_dx … H) -H #rt0 #rs0 #ti0 #ts0 #H1 #_ #H2 #H3 #H4 destruct
elim (eq_inv_nmax_zero … H1) -H1 #H11 #H12 destruct
/2 width=1 by conj/
qed-.
-lemma rtc_ist_inv_zero_shift (c): ð\9d\90\93â\9dªð\9d\9f\8e,â\86\95*câ\9d« â\86\92 ð\9d\90\93â\9dªð\9d\9f\8e,câ\9d«.
+lemma rtc_ist_inv_zero_shift (c): ð\9d\90\93â\9d¨ð\9d\9f\8e,â\86\95*câ\9d© â\86\92 ð\9d\90\93â\9d¨ð\9d\9f\8e,câ\9d©.
#c #H elim (rtc_ist_inv_shift … H) -H //
qed-.