lemma veq_canc_dx (M): is_model M → right_cancellable … (veq M).
/3 width=3 by veq_trans, veq_sym/ qed-.
-(* Properties with evaluation lift ******************************************)
+(* Properties with evaluation push ******************************************)
-theorem vlift_swap (M): is_model M →
+theorem vpush_swap (M): is_model M →
∀i1,i2. i1 ≤ i2 →
∀lv,d1,d2. ⫯[i1←d1] ⫯[i2←d2] lv ≗{M} ⫯[↑i2←d2] ⫯[i1←d1] lv.
#M #HM #i1 #i2 #Hi12 #lv #d1 #d2 #j
elim (lt_or_eq_or_gt j i1) #Hji1 destruct
[ lapply (lt_to_le_to_lt … Hji1 Hi12) #Hji2
- >vlift_lt // >vlift_lt // >vlift_lt /2 width=1 by lt_S/ >vlift_lt //
+ >vpush_lt // >vpush_lt // >vpush_lt /2 width=1 by lt_S/ >vpush_lt //
/2 width=1 by veq_refl/
-| >vlift_eq >vlift_lt /2 width=1 by monotonic_le_plus_l/ >vlift_eq
+| >vpush_eq >vpush_lt /2 width=1 by monotonic_le_plus_l/ >vpush_eq
/2 width=1 by mr/
-| >vlift_gt // elim (lt_or_eq_or_gt (↓j) i2) #Hji2 destruct
- [ >vlift_lt // >vlift_lt /2 width=1 by lt_minus_to_plus/ >vlift_gt //
+| >vpush_gt // elim (lt_or_eq_or_gt (↓j) i2) #Hji2 destruct
+ [ >vpush_lt // >vpush_lt /2 width=1 by lt_minus_to_plus/ >vpush_gt //
/2 width=1 by veq_refl/
- | >vlift_eq <(lt_succ_pred … Hji1) >vlift_eq
+ | >vpush_eq <(lt_succ_pred … Hji1) >vpush_eq
/2 width=1 by mr/
| lapply (le_to_lt_to_lt … Hi12 Hji2) #Hi1j
- >vlift_gt // >vlift_gt /2 width=1 by lt_minus_to_plus_r/ >vlift_gt //
+ >vpush_gt // >vpush_gt /2 width=1 by lt_minus_to_plus_r/ >vpush_gt //
/2 width=1 by veq_refl/
]
]
qed.
-lemma vlift_comp (M): is_model M →
- ∀i. compatible_3 … (vlift M i) (sq M) (veq M) (veq M).
+lemma vpush_comp (M): is_model M →
+ ∀i. compatible_3 … (vpush M i) (sq M) (veq M) (veq M).
#M #HM #i #d1 #d2 #Hd12 #lv1 #lv2 #HLv12 #j
elim (lt_or_eq_or_gt j i) #Hij destruct
-[ >vlift_lt // >vlift_lt //
-| >vlift_eq >vlift_eq //
-| >vlift_gt // >vlift_gt //
+[ >vpush_lt // >vpush_lt //
+| >vpush_eq >vpush_eq //
+| >vpush_gt // >vpush_gt //
]
qed-.
[ /4 width=5 by seq_trans, seq_sym, ms/
| /4 width=5 by seq_sym, ml, mq/
| /4 width=3 by seq_trans, seq_sym, mg/
-| /5 width=5 by vlift_comp, seq_sym, md, mq/
-| /5 width=1 by vlift_comp, mi, mr/
+| /5 width=5 by vpush_comp, seq_sym, md, mq/
+| /5 width=1 by vpush_comp, mi, mr/
| /4 width=5 by seq_sym, ma, mp, mq/
| /4 width=5 by seq_sym, me, mq/
]