Step
*
of Lemma
cubical-eta
∀[X:CubicalSet]. ∀[A:{X ⊢ _}]. ∀[B:{X.A ⊢ _}]. ∀[w:{X ⊢ _:ΠA B}]. ((λapp((w)p; q)) = w ∈ {X ⊢ _:ΠA B})
BY
{ xxx((Auto THEN Symmetry) THEN Assert ⌜w = (λapp((w)p; q)) ∈ (I:(Cname List) ⟶ a:X(I) ⟶ ((fst(ΠA B)) I a))⌝⋅)xxx }
1
.....assertion.....
1. X : CubicalSet
2. A : {X ⊢ _}
3. B : {X.A ⊢ _}
4. w : {X ⊢ _:ΠA B}
⊢ w = (λapp((w)p; q)) ∈ (I:(Cname List) ⟶ a:X(I) ⟶ ((fst(ΠA B)) I a))
2
1. X : CubicalSet
2. A : {X ⊢ _}
3. B : {X.A ⊢ _}
4. w : {X ⊢ _:ΠA B}
5. w = (λapp((w)p; q)) ∈ (I:(Cname List) ⟶ a:X(I) ⟶ ((fst(ΠA B)) I a))
⊢ w = (λapp((w)p; q)) ∈ {X ⊢ _:ΠA B}
Latex:
Latex:
\mforall{}[X:CubicalSet]. \mforall{}[A:\{X \mvdash{} \_\}]. \mforall{}[B:\{X.A \mvdash{} \_\}]. \mforall{}[w:\{X \mvdash{} \_:\mPi{}A B\}]. ((\mlambda{}app((w)p; q)) = w)
By
Latex:
xxx((Auto THEN Symmetry) THEN Assert \mkleeneopen{}w = (\mlambda{}app((w)p; q))\mkleeneclose{}\mcdot{})xxx
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