open import Definition.Typed.EqualityRelation
open import Definition.Typed.Restrictions
open import Graded.Modality
module Definition.LogicalRelation.Weakening
{a} {M : Set a}
{𝕄 : Modality M}
(R : Type-restrictions 𝕄)
{{eqrel : EqRelSet R}}
where
open EqRelSet {{...}}
open Type-restrictions R
open import Definition.Untyped M as U hiding (wk; K)
open import Definition.Untyped.Neutral M type-variant
open import Definition.Untyped.Properties M
open import Definition.Typed R
open import Definition.Typed.Properties R
open import Definition.Typed.Weakening R as T hiding (wk; wkEq; wkTerm; wkEqTerm)
open import Definition.LogicalRelation R
open import Definition.LogicalRelation.Irrelevance R
open import Definition.LogicalRelation.Properties R
open import Tools.Function
open import Tools.Nat
open import Tools.Product
import Tools.PropositionalEquality as PE
open import Tools.Reasoning.PropositionalEquality
private
variable
m n : Nat
ρ : Wk m n
Γ Δ : Con Term m
A B t u : Term m
l : TypeLevel
wkTermNe : ∀ {k A} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩neNf k ∷ A → Δ ⊩neNf U.wk ρ k ∷ U.wk ρ A
wkTermNe {ρ = ρ} [ρ] ⊢Δ (neNfₜ neK ⊢k k≡k) =
neNfₜ (wkNeutral ρ neK) (T.wkTerm [ρ] ⊢Δ ⊢k) (~-wk [ρ] ⊢Δ k≡k)
wkEqTermNe : ∀ {k k′ A} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩neNf k ≡ k′ ∷ A → Δ ⊩neNf U.wk ρ k ≡ U.wk ρ k′ ∷ U.wk ρ A
wkEqTermNe {ρ = ρ} [ρ] ⊢Δ (neNfₜ₌ neK neM k≡m) =
neNfₜ₌ (wkNeutral ρ neK) (wkNeutral ρ neM) (~-wk [ρ] ⊢Δ k≡m)
mutual
wkTermℕ : ∀ {n} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩ℕ n ∷ℕ → Δ ⊩ℕ U.wk ρ n ∷ℕ
wkTermℕ {ρ = ρ} [ρ] ⊢Δ (ℕₜ n d n≡n prop) =
ℕₜ (U.wk ρ n) (wkRed:*:Term [ρ] ⊢Δ d)
(≅ₜ-wk [ρ] ⊢Δ n≡n)
(wkNatural-prop [ρ] ⊢Δ prop)
wkNatural-prop : ∀ {n} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Natural-prop Γ n
→ Natural-prop Δ (U.wk ρ n)
wkNatural-prop ρ ⊢Δ (sucᵣ n) = sucᵣ (wkTermℕ ρ ⊢Δ n)
wkNatural-prop ρ ⊢Δ zeroᵣ = zeroᵣ
wkNatural-prop ρ ⊢Δ (ne nf) = ne (wkTermNe ρ ⊢Δ nf)
mutual
wkEqTermℕ : ∀ {t u} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩ℕ t ≡ u ∷ℕ
→ Δ ⊩ℕ U.wk ρ t ≡ U.wk ρ u ∷ℕ
wkEqTermℕ {ρ = ρ} [ρ] ⊢Δ (ℕₜ₌ k k′ d d′ t≡u prop) =
ℕₜ₌ (U.wk ρ k) (U.wk ρ k′) (wkRed:*:Term [ρ] ⊢Δ d)
(wkRed:*:Term [ρ] ⊢Δ d′) (≅ₜ-wk [ρ] ⊢Δ t≡u)
(wk[Natural]-prop [ρ] ⊢Δ prop)
wk[Natural]-prop : ∀ {n n′} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ [Natural]-prop Γ n n′
→ [Natural]-prop Δ (U.wk ρ n) (U.wk ρ n′)
wk[Natural]-prop ρ ⊢Δ (sucᵣ [n≡n′]) = sucᵣ (wkEqTermℕ ρ ⊢Δ [n≡n′])
wk[Natural]-prop ρ ⊢Δ zeroᵣ = zeroᵣ
wk[Natural]-prop ρ ⊢Δ (ne x) = ne (wkEqTermNe ρ ⊢Δ x)
wkTermEmpty : ∀ {n} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩Empty n ∷Empty → Δ ⊩Empty U.wk ρ n ∷Empty
wkTermEmpty {ρ = ρ} [ρ] ⊢Δ (Emptyₜ n d n≡n (ne prop)) =
Emptyₜ (U.wk ρ n) (wkRed:*:Term [ρ] ⊢Δ d)
(≅ₜ-wk [ρ] ⊢Δ n≡n)
(ne (wkTermNe [ρ] ⊢Δ prop))
wk[Empty]-prop : ∀ {n n′} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ [Empty]-prop Γ n n′
→ [Empty]-prop Δ (U.wk ρ n) (U.wk ρ n′)
wk[Empty]-prop ρ ⊢Δ (ne x) = ne (wkEqTermNe ρ ⊢Δ x)
wkEqTermEmpty : ∀ {t u} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩Empty t ≡ u ∷Empty
→ Δ ⊩Empty U.wk ρ t ≡ U.wk ρ u ∷Empty
wkEqTermEmpty {ρ = ρ} [ρ] ⊢Δ (Emptyₜ₌ k k′ d d′ t≡u prop) =
Emptyₜ₌ (U.wk ρ k) (U.wk ρ k′) (wkRed:*:Term [ρ] ⊢Δ d)
(wkRed:*:Term [ρ] ⊢Δ d′) (≅ₜ-wk [ρ] ⊢Δ t≡u)
(wk[Empty]-prop [ρ] ⊢Δ prop)
wkUnit-prop : ∀ {s t} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Unit-prop Γ s t
→ Unit-prop Δ s (U.wk ρ t)
wkUnit-prop [ρ] ⊢Δ starᵣ = starᵣ
wkUnit-prop [ρ] ⊢Δ (ne x) = ne (wkTermNe [ρ] ⊢Δ x)
wk[Unitʷ]-prop : ∀ {t u} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ [Unitʷ]-prop Γ t u
→ [Unitʷ]-prop Δ (U.wk ρ t) (U.wk ρ u)
wk[Unitʷ]-prop [ρ] ⊢Δ starᵣ = starᵣ
wk[Unitʷ]-prop [ρ] ⊢Δ (ne x) = ne (wkEqTermNe [ρ] ⊢Δ x)
wkTermUnit : ∀ {n s} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩Unit⟨ s ⟩ n ∷Unit → Δ ⊩Unit⟨ s ⟩ U.wk ρ n ∷Unit
wkTermUnit {ρ = ρ} [ρ] ⊢Δ (Unitₜ n d n≡n prop) =
Unitₜ (U.wk ρ n) (wkRed:*:Term [ρ] ⊢Δ d)
(≅ₜ-wk [ρ] ⊢Δ n≡n) (wkUnit-prop [ρ] ⊢Δ prop)
wkEqTermUnit : ∀ {t u s} → ρ ∷ Δ ⊇ Γ → (⊢Δ : ⊢ Δ)
→ Γ ⊩Unit⟨ s ⟩ t ≡ u ∷Unit
→ Δ ⊩Unit⟨ s ⟩ U.wk ρ t ≡ U.wk ρ u ∷Unit
wkEqTermUnit [ρ] ⊢Δ (Unitₜ₌ˢ ⊢t ⊢u ok) =
Unitₜ₌ˢ (T.wkTerm [ρ] ⊢Δ ⊢t) (T.wkTerm [ρ] ⊢Δ ⊢u) ok
wkEqTermUnit {ρ} [ρ] ⊢Δ (Unitₜ₌ʷ k k′ d d′ k≡k′ prop ok) =
Unitₜ₌ʷ (U.wk ρ k) (U.wk ρ k′) (wkRed:*:Term [ρ] ⊢Δ d)
(wkRed:*:Term [ρ] ⊢Δ d′) (≅ₜ-wk [ρ] ⊢Δ k≡k′)
(wk[Unitʷ]-prop [ρ] ⊢Δ prop) ok
wk :
{ρ : Wk m n} →
ρ ∷ Δ ⊇ Γ → ⊢ Δ → Γ ⊩⟨ l ⟩ A → Δ ⊩⟨ l ⟩ U.wk ρ A
wkEq :
([ρ] : ρ ∷ Δ ⊇ Γ) (⊢Δ : ⊢ Δ) ([A] : Γ ⊩⟨ l ⟩ A) →
Γ ⊩⟨ l ⟩ A ≡ B / [A] →
Δ ⊩⟨ l ⟩ U.wk ρ A ≡ U.wk ρ B / wk [ρ] ⊢Δ [A]
wkTerm :
([ρ] : ρ ∷ Δ ⊇ Γ) (⊢Δ : ⊢ Δ) ([A] : Γ ⊩⟨ l ⟩ A) →
Γ ⊩⟨ l ⟩ t ∷ A / [A] →
Δ ⊩⟨ l ⟩ U.wk ρ t ∷ U.wk ρ A / wk [ρ] ⊢Δ [A]
wkEqTerm :
([ρ] : ρ ∷ Δ ⊇ Γ) (⊢Δ : ⊢ Δ) ([A] : Γ ⊩⟨ l ⟩ A) →
Γ ⊩⟨ l ⟩ t ≡ u ∷ A / [A] →
Δ ⊩⟨ l ⟩ U.wk ρ t ≡ U.wk ρ u ∷ U.wk ρ A / wk [ρ] ⊢Δ [A]
wk ρ ⊢Δ (Uᵣ′ l′ l< ⊢Γ) = Uᵣ′ l′ l< ⊢Δ
wk ρ ⊢Δ (ℕᵣ D) = ℕᵣ (wkRed:*: ρ ⊢Δ D)
wk ρ ⊢Δ (Emptyᵣ D) = Emptyᵣ (wkRed:*: ρ ⊢Δ D)
wk ρ ⊢Δ (Unitᵣ (Unitₜ D ok)) =
Unitᵣ (Unitₜ (wkRed:*: ρ ⊢Δ D) ok)
wk {ρ = ρ} [ρ] ⊢Δ (ne′ K D neK K≡K) =
ne′ (U.wk ρ K) (wkRed:*: [ρ] ⊢Δ D) (wkNeutral ρ neK) (≅-wk [ρ] ⊢Δ K≡K)
wk
{m = m} {Δ = Δ} {Γ = Γ} {l = l} {A = A} {ρ = ρ} [ρ] ⊢Δ
(Πᵣ′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok) =
let ⊢ρF = T.wk [ρ] ⊢Δ ⊢F
[F]′ : ∀ {k} {ρ : Wk k m} {ρ′ E} ([ρ] : ρ ∷ E ⊇ Δ) ([ρ′] : ρ′ ∷ Δ ⊇ Γ) (⊢E : ⊢ E)
→ E ⊩⟨ l ⟩ U.wk ρ (U.wk ρ′ F)
[F]′ {_} {ρ} {ρ′} [ρ] [ρ′] ⊢E = irrelevance′
(PE.sym (wk-comp ρ ρ′ F))
([F] ([ρ] •ₜ [ρ′]) ⊢E)
[a]′ : ∀ {k} {ρ : Wk k m} {ρ′ E a} ([ρ] : ρ ∷ E ⊇ Δ) ([ρ′] : ρ′ ∷ Δ ⊇ Γ) (⊢E : ⊢ E)
([a] : E ⊩⟨ l ⟩ a ∷ U.wk ρ (U.wk ρ′ F) / [F]′ [ρ] [ρ′] ⊢E)
→ E ⊩⟨ l ⟩ a ∷ U.wk (ρ • ρ′) F / [F] ([ρ] •ₜ [ρ′]) ⊢E
[a]′ {_} {ρ} {ρ′} [ρ] [ρ′] ⊢E [a] = irrelevanceTerm′ (wk-comp ρ ρ′ F)
([F]′ [ρ] [ρ′] ⊢E) ([F] ([ρ] •ₜ [ρ′]) ⊢E) [a]
[G]′ : ∀ {k} {ρ : Wk k m} {ρ′} {E} {a} ([ρ] : ρ ∷ E ⊇ Δ) ([ρ′] : ρ′ ∷ Δ ⊇ Γ) (⊢E : ⊢ E)
([a] : E ⊩⟨ l ⟩ a ∷ U.wk ρ (U.wk ρ′ F) / [F]′ [ρ] [ρ′] ⊢E)
→ E ⊩⟨ l ⟩ U.wk (lift (ρ • ρ′)) G [ a ]₀
[G]′ {_} η η′ ⊢E [a] = [G] (η •ₜ η′) ⊢E ([a]′ η η′ ⊢E [a])
in Πᵣ′ (U.wk ρ F) (U.wk (lift ρ) G) (T.wkRed:*: [ρ] ⊢Δ D) ⊢ρF
(T.wk (lift [ρ]) (⊢Δ ∙ ⊢ρF) ⊢G)
(≅-wk [ρ] ⊢Δ A≡A)
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ → irrelevance′ (PE.sym (wk-comp ρ₁ ρ F))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] → irrelevance′ (wk-comp-subst ρ₁ ρ G)
([G]′ [ρ₁] [ρ] ⊢Δ₁ [a]))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] [b] [a≡b] →
let [a≡b]′ = irrelevanceEqTerm′ (wk-comp ρ₁ ρ F)
([F]′ [ρ₁] [ρ] ⊢Δ₁)
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁)
[a≡b]
in irrelevanceEq″ (wk-comp-subst ρ₁ ρ G)
(wk-comp-subst ρ₁ ρ G)
([G]′ [ρ₁] [ρ] ⊢Δ₁ [a])
(irrelevance′
(wk-comp-subst ρ₁ ρ G)
([G]′ [ρ₁] [ρ] ⊢Δ₁ [a]))
(G-ext ([ρ₁] •ₜ [ρ]) ⊢Δ₁
([a]′ [ρ₁] [ρ] ⊢Δ₁ [a])
([a]′ [ρ₁] [ρ] ⊢Δ₁ [b])
[a≡b]′))
ok
wk
{m = m} {Δ = Δ} {Γ = Γ} {l = l} {A = A} {ρ = ρ} [ρ] ⊢Δ
(𝕨′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok) =
let ⊢ρF = T.wk [ρ] ⊢Δ ⊢F
[F]′ : ∀ {k} {ρ : Wk k m} {ρ′ E} ([ρ] : ρ ∷ E ⊇ Δ) ([ρ′] : ρ′ ∷ Δ ⊇ Γ) (⊢E : ⊢ E)
→ E ⊩⟨ l ⟩ U.wk ρ (U.wk ρ′ F)
[F]′ {_} {ρ} {ρ′} [ρ] [ρ′] ⊢E = irrelevance′
(PE.sym (wk-comp ρ ρ′ F))
([F] ([ρ] •ₜ [ρ′]) ⊢E)
[a]′ : ∀ {k} {ρ : Wk k m} {ρ′ E a} ([ρ] : ρ ∷ E ⊇ Δ) ([ρ′] : ρ′ ∷ Δ ⊇ Γ) (⊢E : ⊢ E)
([a] : E ⊩⟨ l ⟩ a ∷ U.wk ρ (U.wk ρ′ F) / [F]′ [ρ] [ρ′] ⊢E)
→ E ⊩⟨ l ⟩ a ∷ U.wk (ρ • ρ′) F / [F] ([ρ] •ₜ [ρ′]) ⊢E
[a]′ {_} {ρ} {ρ′} [ρ] [ρ′] ⊢E [a] = irrelevanceTerm′ (wk-comp ρ ρ′ F)
([F]′ [ρ] [ρ′] ⊢E) ([F] ([ρ] •ₜ [ρ′]) ⊢E) [a]
[G]′ : ∀ {k} {ρ : Wk k m} {ρ′ E a} ([ρ] : ρ ∷ E ⊇ Δ) ([ρ′] : ρ′ ∷ Δ ⊇ Γ) (⊢E : ⊢ E)
([a] : E ⊩⟨ l ⟩ a ∷ U.wk ρ (U.wk ρ′ F) / [F]′ [ρ] [ρ′] ⊢E)
→ E ⊩⟨ l ⟩ U.wk (lift (ρ • ρ′)) G [ a ]₀
[G]′ {_} η η′ ⊢E [a] = [G] (η •ₜ η′) ⊢E ([a]′ η η′ ⊢E [a])
in 𝕨′ (U.wk ρ F) (U.wk (lift ρ) G) (T.wkRed:*: [ρ] ⊢Δ D) ⊢ρF
(T.wk (lift [ρ]) (⊢Δ ∙ ⊢ρF) ⊢G)
(≅-wk [ρ] ⊢Δ A≡A)
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ → irrelevance′ (PE.sym (wk-comp ρ₁ ρ F))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] → irrelevance′ (wk-comp-subst ρ₁ ρ G)
([G]′ [ρ₁] [ρ] ⊢Δ₁ [a]))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] [b] [a≡b] →
let [a≡b]′ = irrelevanceEqTerm′ (wk-comp ρ₁ ρ F)
([F]′ [ρ₁] [ρ] ⊢Δ₁)
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁)
[a≡b]
in irrelevanceEq″ (wk-comp-subst ρ₁ ρ G)
(wk-comp-subst ρ₁ ρ G)
([G]′ [ρ₁] [ρ] ⊢Δ₁ [a])
(irrelevance′
(wk-comp-subst ρ₁ ρ G)
([G]′ [ρ₁] [ρ] ⊢Δ₁ [a]))
(G-ext ([ρ₁] •ₜ [ρ]) ⊢Δ₁
([a]′ [ρ₁] [ρ] ⊢Δ₁ [a])
([a]′ [ρ₁] [ρ] ⊢Δ₁ [b])
[a≡b]′))
ok
wk ρ∷⊇ ⊢Δ (Idᵣ ⊩A) = Idᵣ (record
{ ⇒*Id = wkRed:*: ρ∷⊇ ⊢Δ ⇒*Id
; ⊩Ty = wk ρ∷⊇ ⊢Δ ⊩Ty
; ⊩lhs = wkTerm ρ∷⊇ ⊢Δ ⊩Ty ⊩lhs
; ⊩rhs = wkTerm ρ∷⊇ ⊢Δ ⊩Ty ⊩rhs
})
where
open _⊩ₗId_ ⊩A
wk ρ ⊢Δ (emb 0<1 x) = emb 0<1 (wk ρ ⊢Δ x)
wkEq ρ ⊢Δ (Uᵣ′ _ _ _) PE.refl = PE.refl
wkEq ρ ⊢Δ (ℕᵣ D) A≡B = wkRed* ρ ⊢Δ A≡B
wkEq ρ ⊢Δ (Emptyᵣ D) A≡B = wkRed* ρ ⊢Δ A≡B
wkEq ρ ⊢Δ (Unitᵣ (Unitₜ D _)) A≡B = wkRed* ρ ⊢Δ A≡B
wkEq {ρ = ρ} [ρ] ⊢Δ (ne′ _ _ _ _) (ne₌ M D′ neM K≡M) =
ne₌ (U.wk ρ M) (wkRed:*: [ρ] ⊢Δ D′)
(wkNeutral ρ neM) (≅-wk [ρ] ⊢Δ K≡M)
wkEq {ρ = ρ} [ρ] ⊢Δ (Πᵣ′ F G D ⊢F ⊢G A≡A [F] [G] G-ext _)
(B₌ F′ G′ D′ A≡B [F≡F′] [G≡G′]) =
B₌ (U.wk ρ F′)
(U.wk (lift ρ) G′) (T.wkRed:*: [ρ] ⊢Δ D′) (≅-wk [ρ] ⊢Δ A≡B)
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ → irrelevanceEq″ (PE.sym (wk-comp ρ₁ ρ F))
(PE.sym (wk-comp ρ₁ ρ F′))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁)
(irrelevance′ (PE.sym (wk-comp ρ₁ ρ F))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
([F≡F′] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] →
let [a]′ = irrelevanceTerm′ (wk-comp ρ₁ ρ F)
(irrelevance′ (PE.sym (wk-comp ρ₁ ρ F))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁) [a]
in irrelevanceEq″ (wk-comp-subst ρ₁ ρ G)
(wk-comp-subst ρ₁ ρ G′)
([G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′)
(irrelevance′ (wk-comp-subst ρ₁ ρ G)
([G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′))
([G≡G′] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′))
wkEq {ρ = ρ} [ρ] ⊢Δ (𝕨′ F G D ⊢F ⊢G A≡A [F] [G] G-ext _)
(B₌ F′ G′ D′ A≡B [F≡F′] [G≡G′]) =
B₌ (U.wk ρ F′) (U.wk (lift ρ) G′) (T.wkRed:*: [ρ] ⊢Δ D′)
(≅-wk [ρ] ⊢Δ A≡B)
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ → irrelevanceEq″ (PE.sym (wk-comp ρ₁ ρ F))
(PE.sym (wk-comp ρ₁ ρ F′))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁)
(irrelevance′ (PE.sym (wk-comp ρ₁ ρ F))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
([F≡F′] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] →
let [a]′ = irrelevanceTerm′ (wk-comp ρ₁ ρ F)
(irrelevance′ (PE.sym (wk-comp ρ₁ ρ F))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁))
([F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁) [a]
in irrelevanceEq″ (wk-comp-subst ρ₁ ρ G)
(wk-comp-subst ρ₁ ρ G′)
([G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′)
(irrelevance′ (wk-comp-subst ρ₁ ρ G)
([G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′))
([G≡G′] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′))
wkEq ρ∷⊇ ⊢Δ (Idᵣ ⊩A) A≡B = Id₌′
(wkRed:*: ρ∷⊇ ⊢Δ ⇒*Id′)
(wkEq ρ∷⊇ ⊢Δ ⊩Ty Ty≡Ty′)
(wkEqTerm ρ∷⊇ ⊢Δ ⊩Ty lhs≡lhs′)
(wkEqTerm ρ∷⊇ ⊢Δ ⊩Ty rhs≡rhs′)
where
open _⊩ₗId_ ⊩A
open _⊩ₗId_≡_/_ A≡B
wkEq ρ ⊢Δ (emb 0<1 x) A≡B = wkEq ρ ⊢Δ x A≡B
wkTerm {ρ = ρ} [ρ] ⊢Δ (Uᵣ′ .⁰ 0<1 ⊢Γ) (Uₜ A d typeA A≡A [t]) =
Uₜ (U.wk ρ A) (wkRed:*:Term [ρ] ⊢Δ d)
(wkType ρ typeA) (≅ₜ-wk [ρ] ⊢Δ A≡A) (wk [ρ] ⊢Δ [t])
wkTerm ρ ⊢Δ (ℕᵣ D) [t] = wkTermℕ ρ ⊢Δ [t]
wkTerm ρ ⊢Δ (Emptyᵣ D) [t] = wkTermEmpty ρ ⊢Δ [t]
wkTerm ρ ⊢Δ (Unitᵣ (Unitₜ D _)) [t] = wkTermUnit ρ ⊢Δ [t]
wkTerm {ρ = ρ} [ρ] ⊢Δ (ne′ K D neK K≡K) (neₜ k d nf) =
neₜ (U.wk ρ k) (wkRed:*:Term [ρ] ⊢Δ d) (wkTermNe [ρ] ⊢Δ nf)
wkTerm
{ρ = ρ} [ρ] ⊢Δ (Πᵣ′ F G D ⊢F ⊢G A≡A [F] [G] G-ext _)
(Πₜ f d funcF f≡f [f] [f]₁) =
Πₜ (U.wk ρ f) (wkRed:*:Term [ρ] ⊢Δ d) (wkFunction ρ funcF)
(≅ₜ-wk [ρ] ⊢Δ f≡f)
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] [b] [a≡b] →
let F-compEq = wk-comp ρ₁ ρ F
G-compEq = wk-comp-subst ρ₁ ρ G
[F]₁ = [F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁
[F]₂ = irrelevance′ (PE.sym (wk-comp ρ₁ ρ F)) [F]₁
[a]′ = irrelevanceTerm′ F-compEq [F]₂ [F]₁ [a]
[b]′ = irrelevanceTerm′ F-compEq [F]₂ [F]₁ [b]
[G]₁ = [G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′
[G]₂ = irrelevance′ G-compEq [G]₁
[a≡b]′ = irrelevanceEqTerm′ F-compEq [F]₂ [F]₁ [a≡b]
in irrelevanceEqTerm″
(PE.cong (λ x → x ∘ _) (PE.sym (wk-comp ρ₁ ρ _)))
(PE.cong (λ x → x ∘ _) (PE.sym (wk-comp ρ₁ ρ _)))
G-compEq
[G]₁ [G]₂
([f] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′ [b]′ [a≡b]′))
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] →
let [F]₁ = [F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁
[F]₂ = irrelevance′ (PE.sym (wk-comp ρ₁ ρ F)) [F]₁
[a]′ = irrelevanceTerm′ (wk-comp ρ₁ ρ F) [F]₂ [F]₁ [a]
[G]₁ = [G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′
[G]₂ = irrelevance′ (wk-comp-subst ρ₁ ρ G) [G]₁
in irrelevanceTerm″ (wk-comp-subst ρ₁ ρ G)
(PE.cong (λ x → x ∘ _) (PE.sym (wk-comp ρ₁ ρ _)))
[G]₁ [G]₂ ([f]₁ ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′))
wkTerm {ρ = ρ} [ρ] ⊢Δ [A]@(Bᵣ′ BΣʷ F G D ⊢F ⊢G A≡A [F] [G] G-ext _)
(Σₜ p d p≅p (prodₙ {t = p₁}) (PE.refl , [p₁] , [p₂] , PE.refl)) =
let [ρF] = irrelevance′ (PE.sym (wk-comp id ρ F)) ([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρp₁] = wkTerm [ρ] ⊢Δ ([F] id (wf ⊢F)) [p₁]
[ρp₁]′ = (irrelevanceTerm′
(begin
U.wk ρ (U.wk id F)
≡⟨ PE.cong (U.wk ρ) (wk-id F) ⟩
U.wk ρ F
≡⟨ PE.sym (wk-id (U.wk ρ F)) ⟩
U.wk id (U.wk ρ F)
∎)
(wk [ρ] ⊢Δ ([F] id (wf ⊢F)))
[ρF]
[ρp₁])
[ρp₂] = wkTerm [ρ] ⊢Δ ([G] id (wf ⊢F) [p₁]) [p₂]
[ρG]′ = (irrelevance′ (wk-comp-subst id ρ G)
([G] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F))
(irrelevanceTerm′ (wk-comp id ρ F)
[ρF]
([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρp₁]′)))
[ρp₂]′ = irrelevanceTerm′
(begin
U.wk ρ (U.wk (lift id) G [ p₁ ]₀)
≡⟨ PE.cong (λ x → U.wk ρ (x [ p₁ ]₀)) (wk-lift-id G) ⟩
U.wk ρ (G [ p₁ ]₀)
≡⟨ wk-β G ⟩
(U.wk (lift ρ) G) [ U.wk ρ p₁ ]₀
≡⟨ PE.cong (λ x → x [ U.wk ρ p₁ ]₀) (PE.sym (wk-lift-id (U.wk (lift ρ) G))) ⟩
(U.wk (lift id) (U.wk (lift ρ) G)) [ U.wk ρ p₁ ]₀
∎)
(wk [ρ] ⊢Δ ([G] id (wf ⊢F) [p₁])) [ρG]′
[ρp₂]
in Σₜ (U.wk ρ p) (wkRed:*:Term [ρ] ⊢Δ d) (≅ₜ-wk [ρ] ⊢Δ p≅p)
(wkProduct ρ prodₙ) (PE.refl , [ρp₁]′ , [ρp₂]′ , PE.refl)
wkTerm {ρ = ρ} [ρ] ⊢Δ [A]@(Bᵣ′ BΣʷ F G D ⊢F ⊢G A≡A [F] [G] G-ext _)
(Σₜ p d p≅p (ne x) p~p) =
Σₜ (U.wk ρ p) (wkRed:*:Term [ρ] ⊢Δ d) (≅ₜ-wk [ρ] ⊢Δ p≅p)
(wkProduct ρ (ne x)) (~-wk [ρ] ⊢Δ p~p)
wkTerm
{ρ = ρ} [ρ] ⊢Δ [A]@(Bᵣ′ BΣˢ F G D ⊢F ⊢G A≡A [F] [G] G-ext _)
(Σₜ p d p≅p pProd ([fst] , [snd])) =
let [ρF] = irrelevance′ (PE.sym (wk-comp id ρ F)) ([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρfst] = wkTerm [ρ] ⊢Δ ([F] id (wf ⊢F)) [fst]
[ρfst]′ = (irrelevanceTerm′
(begin
U.wk ρ (U.wk id F)
≡⟨ PE.cong (U.wk ρ) (wk-id F) ⟩
U.wk ρ F
≡⟨ PE.sym (wk-id (U.wk ρ F)) ⟩
U.wk id (U.wk ρ F)
∎)
(wk [ρ] ⊢Δ ([F] id (wf ⊢F)))
[ρF]
[ρfst])
[ρsnd] = wkTerm [ρ] ⊢Δ ([G] id (wf ⊢F) [fst]) [snd]
[ρG]′ = (irrelevance′ (wk-comp-subst id ρ G)
([G] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F))
(irrelevanceTerm′ (wk-comp id ρ F)
[ρF]
([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρfst]′)))
[ρsnd]′ = irrelevanceTerm′
(begin
U.wk ρ (U.wk (lift id) G [ fst _ p ]₀) ≡⟨ PE.cong (λ x → U.wk ρ (x [ fst _ p ]₀)) (wk-lift-id G) ⟩
U.wk ρ (G [ fst _ p ]₀) ≡⟨ wk-β G ⟩
(U.wk (lift ρ) G) [ fst _ (U.wk ρ p) ]₀ ≡⟨ PE.cong (λ x → x [ fst _ (U.wk ρ p) ]₀)
(PE.sym (wk-lift-id (U.wk (lift ρ) G))) ⟩
(U.wk (lift id) (U.wk (lift ρ) G)) [ fst _ (U.wk ρ p) ]₀ ∎)
(wk [ρ] ⊢Δ ([G] id (wf ⊢F) [fst])) [ρG]′
[ρsnd]
in Σₜ (U.wk ρ p) (wkRed:*:Term [ρ] ⊢Δ d) (≅ₜ-wk [ρ] ⊢Δ p≅p)
(wkProduct ρ pProd) ([ρfst]′ , [ρsnd]′)
wkTerm ρ∷⊇ ⊢Δ (Idᵣ ⊩A) ⊩t@(_ , t⇒*u , _) =
_
, wkRed:*:Term ρ∷⊇ ⊢Δ t⇒*u
, (case ⊩Id∷-view-inhabited ⊩t of λ where
(rflᵣ lhs≡rhs) → rflₙ , wkEqTerm ρ∷⊇ ⊢Δ ⊩Ty lhs≡rhs
(ne u-n u~u) → ne (wkNeutral _ u-n) , ~-wk ρ∷⊇ ⊢Δ u~u)
where
open _⊩ₗId_ ⊩A
wkTerm ρ ⊢Δ (emb 0<1 x) t = wkTerm ρ ⊢Δ x t
wkEqTerm {ρ = ρ} [ρ] ⊢Δ (Uᵣ′ .⁰ 0<1 ⊢Γ) (Uₜ₌ A B d d′ typeA typeB A≡B [t] [u] [t≡u]) =
Uₜ₌ (U.wk ρ A) (U.wk ρ B) (wkRed:*:Term [ρ] ⊢Δ d) (wkRed:*:Term [ρ] ⊢Δ d′)
(wkType ρ typeA) (wkType ρ typeB) (≅ₜ-wk [ρ] ⊢Δ A≡B)
(wk [ρ] ⊢Δ [t]) (wk [ρ] ⊢Δ [u]) (wkEq [ρ] ⊢Δ [t] [t≡u])
wkEqTerm ρ ⊢Δ (ℕᵣ D) [t≡u] = wkEqTermℕ ρ ⊢Δ [t≡u]
wkEqTerm ρ ⊢Δ (Emptyᵣ D) [t≡u] = wkEqTermEmpty ρ ⊢Δ [t≡u]
wkEqTerm ρ ⊢Δ (Unitᵣ (Unitₜ D _)) [t≡u] = wkEqTermUnit ρ ⊢Δ [t≡u]
wkEqTerm {ρ = ρ} [ρ] ⊢Δ (ne′ K D neK K≡K) (neₜ₌ k m d d′ nf) =
neₜ₌ (U.wk ρ k) (U.wk ρ m)
(wkRed:*:Term [ρ] ⊢Δ d) (wkRed:*:Term [ρ] ⊢Δ d′)
(wkEqTermNe [ρ] ⊢Δ nf)
wkEqTerm {ρ = ρ} [ρ] ⊢Δ (Πᵣ′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok)
(Πₜ₌ f g d d′ funcF funcG f≡g [t] [u] [f≡g]) =
let [A] = Πᵣ′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok
in Πₜ₌ (U.wk ρ f) (U.wk ρ g) (wkRed:*:Term [ρ] ⊢Δ d) (wkRed:*:Term [ρ] ⊢Δ d′)
(wkFunction ρ funcF) (wkFunction ρ funcG)
(≅ₜ-wk [ρ] ⊢Δ f≡g) (wkTerm [ρ] ⊢Δ [A] [t]) (wkTerm [ρ] ⊢Δ [A] [u])
(λ {_} {ρ₁} [ρ₁] ⊢Δ₁ [a] →
let [F]₁ = [F] ([ρ₁] •ₜ [ρ]) ⊢Δ₁
[F]₂ = irrelevance′ (PE.sym (wk-comp ρ₁ ρ F)) [F]₁
[a]′ = irrelevanceTerm′ (wk-comp ρ₁ ρ F) [F]₂ [F]₁ [a]
[G]₁ = [G] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′
[G]₂ = irrelevance′ (wk-comp-subst ρ₁ ρ G) [G]₁
in irrelevanceEqTerm″ (PE.cong (λ y → y ∘ _) (PE.sym (wk-comp ρ₁ ρ _)))
(PE.cong (λ y → y ∘ _) (PE.sym (wk-comp ρ₁ ρ _)))
(wk-comp-subst ρ₁ ρ G)
[G]₁ [G]₂
([f≡g] ([ρ₁] •ₜ [ρ]) ⊢Δ₁ [a]′))
wkEqTerm {ρ = ρ} [ρ] ⊢Δ [A]@(Bᵣ′ BΣʷ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok)
(Σₜ₌ p r d d′ (prodₙ {t = p₁}) prodₙ p≅r [t] [u]
(PE.refl , PE.refl ,
[p₁] , [r₁] , [p₂] , [r₂] , [fst≡] , [snd≡])) =
let [A] = 𝕨′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok
⊢Γ = wf ⊢F
ρidF≡idρF = begin
U.wk ρ (U.wk id F)
≡⟨ PE.cong (U.wk ρ) (wk-id F) ⟩
U.wk ρ F
≡⟨ PE.sym (wk-id (U.wk ρ F)) ⟩
U.wk id (U.wk ρ F)
∎
[ρF] = irrelevance′ (PE.sym (wk-comp id ρ F)) ([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρp₁] = wkTerm [ρ] ⊢Δ ([F] id ⊢Γ) [p₁]
[ρp₁]′ = irrelevanceTerm′
ρidF≡idρF
(wk [ρ] ⊢Δ ([F] id ⊢Γ)) [ρF]
[ρp₁]
[ρr₁] = wkTerm [ρ] ⊢Δ ([F] id ⊢Γ) [r₁]
[ρr₁]′ = irrelevanceTerm′
ρidF≡idρF
(wk [ρ] ⊢Δ ([F] id ⊢Γ)) [ρF]
[ρr₁]
[ρfst≡] = wkEqTerm [ρ] ⊢Δ ([F] id ⊢Γ) [fst≡]
[ρfst≡]′ = irrelevanceEqTerm′
ρidF≡idρF
(wk [ρ] ⊢Δ ([F] id ⊢Γ)) [ρF]
[ρfst≡]
[ρsnd≡] = wkEqTerm [ρ] ⊢Δ ([G] id ⊢Γ [p₁]) [snd≡]
[ρG]′ = (irrelevance′ (wk-comp-subst id ρ G)
([G] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F))
(irrelevanceTerm′ (wk-comp id ρ F)
[ρF]
([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρp₁]′)))
[ρG]″ = (irrelevance′ (wk-comp-subst id ρ G)
([G] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F))
(irrelevanceTerm′ (wk-comp id ρ F)
[ρF]
([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρr₁]′)))
ρG-eq = λ t → (begin
U.wk ρ (U.wk (lift id) G [ t ]₀)
≡⟨ PE.cong (λ x → U.wk ρ (x [ t ]₀)) (wk-lift-id G) ⟩
U.wk ρ (G [ t ]₀)
≡⟨ wk-β G ⟩
(U.wk (lift ρ) G) [ U.wk ρ t ]₀
≡⟨ PE.cong (λ x → x [ U.wk ρ t ]₀) (PE.sym (wk-lift-id (U.wk (lift ρ) G))) ⟩
(U.wk (lift id) (U.wk (lift ρ) G)) [ U.wk ρ t ]₀
∎)
[ρp₂] = wkTerm [ρ] ⊢Δ ([G] id ⊢Γ [p₁]) [p₂]
[ρp₂]′ = irrelevanceTerm′ (ρG-eq p₁) (wk [ρ] ⊢Δ ([G] id ⊢Γ [p₁])) [ρG]′ [ρp₂]
[ρr₂] = wkTerm [ρ] ⊢Δ ([G] id ⊢Γ [r₁]) [r₂]
[ρr₂]′ = irrelevanceTerm′ (ρG-eq _) (wk [ρ] ⊢Δ ([G] id ⊢Γ [r₁])) [ρG]″ [ρr₂]
[ρsnd≡]′ = irrelevanceEqTerm′
(ρG-eq p₁)
(wk [ρ] ⊢Δ ([G] id (wf ⊢F) [p₁])) [ρG]′
[ρsnd≡]
in Σₜ₌ (U.wk ρ p) (U.wk ρ r) (wkRed:*:Term [ρ] ⊢Δ d) (wkRed:*:Term [ρ] ⊢Δ d′)
(wkProduct ρ prodₙ) (wkProduct ρ prodₙ)
(≅ₜ-wk [ρ] ⊢Δ p≅r) (wkTerm [ρ] ⊢Δ [A] [t]) (wkTerm [ρ] ⊢Δ [A] [u])
(PE.refl , PE.refl ,
[ρp₁]′ , [ρr₁]′ , [ρp₂]′ , [ρr₂]′ , [ρfst≡]′ , [ρsnd≡]′)
wkEqTerm {ρ = ρ} [ρ] ⊢Δ [A]@(Bᵣ′ BΣʷ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok)
(Σₜ₌ p r d d′ (ne x) (ne y) p≅r [t] [u] p~r) =
let [A] = 𝕨′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok
in Σₜ₌ (U.wk ρ p) (U.wk ρ r) (wkRed:*:Term [ρ] ⊢Δ d) (wkRed:*:Term [ρ] ⊢Δ d′)
(wkProduct ρ (ne x)) (wkProduct ρ (ne y))
(≅ₜ-wk [ρ] ⊢Δ p≅r) (wkTerm [ρ] ⊢Δ [A] [t]) (wkTerm [ρ] ⊢Δ [A] [u])
(~-wk [ρ] ⊢Δ p~r)
wkEqTerm {ρ = ρ} [ρ] ⊢Δ [A]@(Bᵣ′ BΣˢ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok)
(Σₜ₌ p r d d′ pProd rProd p≅r [t] [u] ([fstp] , [fstr] , [fst≡] , [snd≡])) =
let [A] = 𝕨′ F G D ⊢F ⊢G A≡A [F] [G] G-ext ok
⊢Γ = wf ⊢F
ρidF≡idρF = begin
U.wk ρ (U.wk id F)
≡⟨ PE.cong (U.wk ρ) (wk-id F) ⟩
U.wk ρ F
≡⟨ PE.sym (wk-id (U.wk ρ F)) ⟩
U.wk id (U.wk ρ F)
∎
[ρF] = irrelevance′ (PE.sym (wk-comp id ρ F)) ([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρfstp] = wkTerm [ρ] ⊢Δ ([F] id ⊢Γ) [fstp]
[ρfstp]′ = irrelevanceTerm′
ρidF≡idρF
(wk [ρ] ⊢Δ ([F] id ⊢Γ)) [ρF]
[ρfstp]
[ρfstr] = wkTerm [ρ] ⊢Δ ([F] id ⊢Γ) [fstr]
[ρfstr]′ = irrelevanceTerm′
ρidF≡idρF
(wk [ρ] ⊢Δ ([F] id ⊢Γ)) [ρF]
[ρfstr]
[ρfst≡] = wkEqTerm [ρ] ⊢Δ ([F] id ⊢Γ) [fst≡]
[ρfst≡]′ = irrelevanceEqTerm′
ρidF≡idρF
(wk [ρ] ⊢Δ ([F] id ⊢Γ)) [ρF]
[ρfst≡]
[ρsnd≡] = wkEqTerm [ρ] ⊢Δ ([G] id ⊢Γ [fstp]) [snd≡]
[ρG]′ = (irrelevance′ (wk-comp-subst id ρ G)
([G] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F))
(irrelevanceTerm′ (wk-comp id ρ F)
[ρF]
([F] [ρ] (wf (T.wk [ρ] ⊢Δ ⊢F)))
[ρfstp]′)))
[ρsnd≡]′ = irrelevanceEqTerm′
(begin
U.wk ρ (U.wk (lift id) G [ fst _ p ]₀) ≡⟨ PE.cong (λ x → U.wk ρ (x [ fst _ p ]₀)) (wk-lift-id G) ⟩
U.wk ρ (G [ fst _ p ]₀) ≡⟨ wk-β G ⟩
(U.wk (lift ρ) G) [ fst _ (U.wk ρ p) ]₀ ≡⟨ PE.cong (λ x → x [ fst _ (U.wk ρ p) ]₀)
(PE.sym (wk-lift-id (U.wk (lift ρ) G))) ⟩
(U.wk (lift id) (U.wk (lift ρ) G)) [ fst _ (U.wk ρ p) ]₀ ∎)
(wk [ρ] ⊢Δ ([G] id (wf ⊢F) [fstp])) [ρG]′
[ρsnd≡]
in Σₜ₌ (U.wk ρ p) (U.wk ρ r) (wkRed:*:Term [ρ] ⊢Δ d) (wkRed:*:Term [ρ] ⊢Δ d′)
(wkProduct ρ pProd) (wkProduct ρ rProd)
(≅ₜ-wk [ρ] ⊢Δ p≅r) (wkTerm [ρ] ⊢Δ [A] [t]) (wkTerm [ρ] ⊢Δ [A] [u])
([ρfstp]′ , [ρfstr]′ , [ρfst≡]′ , [ρsnd≡]′)
wkEqTerm ρ∷⊇ ⊢Δ (Idᵣ ⊩A) t≡u@(_ , _ , t⇒*t′ , u⇒*u′ , _) =
_ , _
, wkRed:*:Term ρ∷⊇ ⊢Δ t⇒*t′
, wkRed:*:Term ρ∷⊇ ⊢Δ u⇒*u′
, (case ⊩Id≡∷-view-inhabited ⊩A t≡u of λ where
(rfl₌ lhs≡rhs) →
rflₙ , rflₙ
, wkEqTerm ρ∷⊇ ⊢Δ ⊩Ty lhs≡rhs
(ne t′-n u′-n t′~u′) →
ne (wkNeutral _ t′-n)
, ne (wkNeutral _ u′-n)
, ~-wk ρ∷⊇ ⊢Δ t′~u′)
where
open _⊩ₗId_ ⊩A
wkEqTerm ρ ⊢Δ (emb 0<1 x) t≡u = wkEqTerm ρ ⊢Δ x t≡u
wkEqTerm ρ ⊢Δ (Bᵣ BΣʷ x) (Σₜ₌ p r d d′ prodₙ (ne y) p≅r [t] [u] ())
wkEqTerm ρ ⊢Δ (Bᵣ BΣʷ x) (Σₜ₌ p r d d′ (ne y) prodₙ p≅r [t] [u] ())