(* Basic properties *********************************************************)
lemma lpx_bind (G):
- â\88\80K1,K2. â\9dªG,K1â\9d« â\8a¢ â¬\88 K2 â\86\92 â\88\80I1,I2. â\9dªG,K1â\9d« ⊢ I1 ⬈ I2 →
- â\9dªG,K1.â\93\98[I1]â\9d« ⊢ ⬈ K2.ⓘ[I2].
+ â\88\80K1,K2. â\9d¨G,K1â\9d© â\8a¢ â¬\88 K2 â\86\92 â\88\80I1,I2. â\9d¨G,K1â\9d© ⊢ I1 ⬈ I2 →
+ â\9d¨G,K1.â\93\98[I1]â\9d© ⊢ ⬈ K2.ⓘ[I2].
/2 width=1 by lex_bind/ qed.
lemma lpx_refl (G): reflexive … (lpx G).
(* Advanced properties ******************************************************)
lemma lpx_bind_refl_dx (G):
- â\88\80K1,K2. â\9dªG,K1â\9d« ⊢ ⬈ K2 →
- â\88\80I. â\9dªG,K1.â\93\98[I]â\9d« ⊢ ⬈ K2.ⓘ[I].
+ â\88\80K1,K2. â\9d¨G,K1â\9d© ⊢ ⬈ K2 →
+ â\88\80I. â\9d¨G,K1.â\93\98[I]â\9d© ⊢ ⬈ K2.ⓘ[I].
/2 width=1 by lex_bind_refl_dx/ qed.
lemma lpx_pair (G):
- â\88\80K1,K2. â\9dªG,K1â\9d« â\8a¢ â¬\88 K2 â\86\92 â\88\80V1,V2. â\9dªG,K1â\9d« ⊢ V1 ⬈ V2 →
- â\88\80I.â\9dªG,K1.â\93\91[I]V1â\9d« ⊢ ⬈ K2.ⓑ[I]V2.
+ â\88\80K1,K2. â\9d¨G,K1â\9d© â\8a¢ â¬\88 K2 â\86\92 â\88\80V1,V2. â\9d¨G,K1â\9d© ⊢ V1 ⬈ V2 →
+ â\88\80I.â\9d¨G,K1.â\93\91[I]V1â\9d© ⊢ ⬈ K2.ⓑ[I]V2.
/2 width=1 by lex_pair/ qed.
(* Basic inversion lemmas ***************************************************)
(* Basic_2A1: was: lpx_inv_atom1 *)
lemma lpx_inv_atom_sn (G):
- â\88\80L2. â\9dªG,â\8b\86â\9d« ⊢ ⬈ L2 → L2 = ⋆.
+ â\88\80L2. â\9d¨G,â\8b\86â\9d© ⊢ ⬈ L2 → L2 = ⋆.
/2 width=2 by lex_inv_atom_sn/ qed-.
lemma lpx_inv_bind_sn (G):
- â\88\80I1,L2,K1. â\9dªG,K1.â\93\98[I1]â\9d« ⊢ ⬈ L2 →
- â\88\83â\88\83I2,K2. â\9dªG,K1â\9d« â\8a¢ â¬\88 K2 & â\9dªG,K1â\9d« ⊢ I1 ⬈ I2 & L2 = K2.ⓘ[I2].
+ â\88\80I1,L2,K1. â\9d¨G,K1.â\93\98[I1]â\9d© ⊢ ⬈ L2 →
+ â\88\83â\88\83I2,K2. â\9d¨G,K1â\9d© â\8a¢ â¬\88 K2 & â\9d¨G,K1â\9d© ⊢ I1 ⬈ I2 & L2 = K2.ⓘ[I2].
/2 width=1 by lex_inv_bind_sn/ qed-.
(* Basic_2A1: was: lpx_inv_atom2 *)
lemma lpx_inv_atom_dx (G):
- â\88\80L1. â\9dªG,L1â\9d« ⊢ ⬈ ⋆ → L1 = ⋆.
+ â\88\80L1. â\9d¨G,L1â\9d© ⊢ ⬈ ⋆ → L1 = ⋆.
/2 width=2 by lex_inv_atom_dx/ qed-.
lemma lpx_inv_bind_dx (G):
- â\88\80I2,L1,K2. â\9dªG,L1â\9d« ⊢ ⬈ K2.ⓘ[I2] →
- â\88\83â\88\83I1,K1. â\9dªG,K1â\9d« â\8a¢ â¬\88 K2 & â\9dªG,K1â\9d« ⊢ I1 ⬈ I2 & L1 = K1.ⓘ[I1].
+ â\88\80I2,L1,K2. â\9d¨G,L1â\9d© ⊢ ⬈ K2.ⓘ[I2] →
+ â\88\83â\88\83I1,K1. â\9d¨G,K1â\9d© â\8a¢ â¬\88 K2 & â\9d¨G,K1â\9d© ⊢ I1 ⬈ I2 & L1 = K1.ⓘ[I1].
/2 width=1 by lex_inv_bind_dx/ qed-.
(* Advanced inversion lemmas ************************************************)
lemma lpx_inv_unit_sn (G):
- â\88\80I,L2,K1. â\9dªG,K1.â\93¤[I]â\9d« ⊢ ⬈ L2 →
- â\88\83â\88\83K2. â\9dªG,K1â\9d« ⊢ ⬈ K2 & L2 = K2.ⓤ[I].
+ â\88\80I,L2,K1. â\9d¨G,K1.â\93¤[I]â\9d© ⊢ ⬈ L2 →
+ â\88\83â\88\83K2. â\9d¨G,K1â\9d© ⊢ ⬈ K2 & L2 = K2.ⓤ[I].
/2 width=1 by lex_inv_unit_sn/ qed-.
(* Basic_2A1: was: lpx_inv_pair1 *)
lemma lpx_inv_pair_sn (G):
- â\88\80I,L2,K1,V1. â\9dªG,K1.â\93\91[I]V1â\9d« ⊢ ⬈ L2 →
- â\88\83â\88\83K2,V2. â\9dªG,K1â\9d« â\8a¢ â¬\88 K2 & â\9dªG,K1â\9d« ⊢ V1 ⬈ V2 & L2 = K2.ⓑ[I]V2.
+ â\88\80I,L2,K1,V1. â\9d¨G,K1.â\93\91[I]V1â\9d© ⊢ ⬈ L2 →
+ â\88\83â\88\83K2,V2. â\9d¨G,K1â\9d© â\8a¢ â¬\88 K2 & â\9d¨G,K1â\9d© ⊢ V1 ⬈ V2 & L2 = K2.ⓑ[I]V2.
/2 width=1 by lex_inv_pair_sn/ qed-.
lemma lpx_inv_unit_dx (G):
- â\88\80I,L1,K2. â\9dªG,L1â\9d« ⊢ ⬈ K2.ⓤ[I] →
- â\88\83â\88\83K1. â\9dªG,K1â\9d« ⊢ ⬈ K2 & L1 = K1.ⓤ[I].
+ â\88\80I,L1,K2. â\9d¨G,L1â\9d© ⊢ ⬈ K2.ⓤ[I] →
+ â\88\83â\88\83K1. â\9d¨G,K1â\9d© ⊢ ⬈ K2 & L1 = K1.ⓤ[I].
/2 width=1 by lex_inv_unit_dx/ qed-.
(* Basic_2A1: was: lpx_inv_pair2 *)
lemma lpx_inv_pair_dx (G):
- â\88\80I,L1,K2,V2. â\9dªG,L1â\9d« ⊢ ⬈ K2.ⓑ[I]V2 →
- â\88\83â\88\83K1,V1. â\9dªG,K1â\9d« â\8a¢ â¬\88 K2 & â\9dªG,K1â\9d« ⊢ V1 ⬈ V2 & L1 = K1.ⓑ[I]V1.
+ â\88\80I,L1,K2,V2. â\9d¨G,L1â\9d© ⊢ ⬈ K2.ⓑ[I]V2 →
+ â\88\83â\88\83K1,V1. â\9d¨G,K1â\9d© â\8a¢ â¬\88 K2 & â\9d¨G,K1â\9d© ⊢ V1 ⬈ V2 & L1 = K1.ⓑ[I]V1.
/2 width=1 by lex_inv_pair_dx/ qed-.
lemma lpx_inv_pair (G):
- â\88\80I1,I2,L1,L2,V1,V2. â\9dªG,L1.â\93\91[I1]V1â\9d« ⊢ ⬈ L2.ⓑ[I2]V2 →
- â\88§â\88§ â\9dªG,L1â\9d« â\8a¢ â¬\88 L2 & â\9dªG,L1â\9d« ⊢ V1 ⬈ V2 & I1 = I2.
+ â\88\80I1,I2,L1,L2,V1,V2. â\9d¨G,L1.â\93\91[I1]V1â\9d© ⊢ ⬈ L2.ⓑ[I2]V2 →
+ â\88§â\88§ â\9d¨G,L1â\9d© â\8a¢ â¬\88 L2 & â\9d¨G,L1â\9d© ⊢ V1 ⬈ V2 & I1 = I2.
/2 width=1 by lex_inv_pair/ qed-.