{-# OPTIONS --without-K --safe #-}
open import Definition.Typed.EqualityRelation
module Definition.LogicalRelation.Substitution.Introductions.Application {{eqrel : EqRelSet}} where
open EqRelSet {{...}}
open import Definition.Untyped
open import Definition.Untyped.Properties
open import Definition.Typed
open import Definition.LogicalRelation
open import Definition.LogicalRelation.Irrelevance
open import Definition.LogicalRelation.Properties
open import Definition.LogicalRelation.Application
open import Definition.LogicalRelation.Substitution
open import Definition.LogicalRelation.Substitution.Introductions.SingleSubst
open import Tools.Empty
open import Tools.Product
import Tools.PropositionalEquality as PE
appᵛ : ∀ {F G t u Γ l}
([Γ] : ⊩ᵛ Γ)
([F] : Γ ⊩ᵛ⟨ l ⟩ F / [Γ])
([ΠFG] : Γ ⊩ᵛ⟨ l ⟩ Π F ▹ G / [Γ])
([t] : Γ ⊩ᵛ⟨ l ⟩ t ∷ Π F ▹ G / [Γ] / [ΠFG])
([u] : Γ ⊩ᵛ⟨ l ⟩ u ∷ F / [Γ] / [F])
→ Γ ⊩ᵛ⟨ l ⟩ t ∘ u ∷ G [ u ] / [Γ] / substSΠ {F} {G} {u} [Γ] [F] [ΠFG] [u]
appᵛ {F} {G} {t} {u} [Γ] [F] [ΠFG] [t] [u] {σ = σ} ⊢Δ [σ] =
let [G[u]] = substSΠ {F} {G} {u} [Γ] [F] [ΠFG] [u]
[σF] = proj₁ ([F] ⊢Δ [σ])
[σΠFG] = proj₁ ([ΠFG] ⊢Δ [σ])
[σt] = proj₁ ([t] ⊢Δ [σ])
[σu] = proj₁ ([u] ⊢Δ [σ])
[σG[u]] = proj₁ ([G[u]] ⊢Δ [σ])
[σG[u]]′ = irrelevance′ (singleSubstLift G u) [σG[u]]
in irrelevanceTerm′ (PE.sym (singleSubstLift G u))
[σG[u]]′ [σG[u]]
(appTerm [σF] [σG[u]]′ [σΠFG] [σt] [σu])
, (λ [σ′] [σ≡σ′] →
let [σu′] = convTerm₂ [σF] (proj₁ ([F] ⊢Δ [σ′]))
(proj₂ ([F] ⊢Δ [σ]) [σ′] [σ≡σ′])
(proj₁ ([u] ⊢Δ [σ′]))
in irrelevanceEqTerm′ (PE.sym (singleSubstLift G u))
[σG[u]]′ [σG[u]]
(app-congTerm [σF] [σG[u]]′ [σΠFG]
(proj₂ ([t] ⊢Δ [σ]) [σ′] [σ≡σ′])
[σu] [σu′]
(proj₂ ([u] ⊢Δ [σ]) [σ′] [σ≡σ′])))
app-congᵛ : ∀ {F G t u a b Γ l}
([Γ] : ⊩ᵛ Γ)
([F] : Γ ⊩ᵛ⟨ l ⟩ F / [Γ])
([ΠFG] : Γ ⊩ᵛ⟨ l ⟩ Π F ▹ G / [Γ])
([t≡u] : Γ ⊩ᵛ⟨ l ⟩ t ≡ u ∷ Π F ▹ G / [Γ] / [ΠFG])
([a] : Γ ⊩ᵛ⟨ l ⟩ a ∷ F / [Γ] / [F])
([b] : Γ ⊩ᵛ⟨ l ⟩ b ∷ F / [Γ] / [F])
([a≡b] : Γ ⊩ᵛ⟨ l ⟩ a ≡ b ∷ F / [Γ] / [F])
→ Γ ⊩ᵛ⟨ l ⟩ t ∘ a ≡ u ∘ b ∷ G [ a ] / [Γ]
/ substSΠ {F} {G} {a} [Γ] [F] [ΠFG] [a]
app-congᵛ {F} {G} {a = a} [Γ] [F] [ΠFG] [t≡u] [a] [b] [a≡b] ⊢Δ [σ] =
let [σF] = proj₁ ([F] ⊢Δ [σ])
[G[a]] = proj₁ (substSΠ {F} {G} {a} [Γ] [F] [ΠFG] [a] ⊢Δ [σ])
[G[a]]′ = irrelevance′ (singleSubstLift G a) [G[a]]
[σΠFG] = proj₁ ([ΠFG] ⊢Δ [σ])
[σa] = proj₁ ([a] ⊢Δ [σ])
[σb] = proj₁ ([b] ⊢Δ [σ])
in irrelevanceEqTerm′ (PE.sym (singleSubstLift G a)) [G[a]]′ [G[a]]
(app-congTerm [σF] [G[a]]′ [σΠFG] ([t≡u] ⊢Δ [σ])
[σa] [σb] ([a≡b] ⊢Δ [σ]))