Step
*
2
2
of Lemma
case-type-same1
1. Gamma : CubicalSet{j}
2. phi : {Gamma ⊢ _:𝔽}
3. A : {Gamma, phi ⊢ _}
4. psi : {Gamma ⊢ _:𝔽}
5. B : {Gamma, psi ⊢ _}
⊢ λI,J,f,rho,c. if (phi(rho)==1) then (c rho f) else (c rho f) fi ∈ I:fset(ℕ)
⟶ J:fset(ℕ)
⟶ f:J ⟶ I
⟶ a:Gamma, phi(I)
⟶ case-cube(phi;A;B;I;a)
⟶ case-cube(phi;A;B;J;f(a))
BY
{ (RepeatFor 4 ((MemCD THENA Auto)) THEN RepUR ``context-subset`` -1 THEN D -1) }
1
1. Gamma : CubicalSet{j}
2. phi : {Gamma ⊢ _:𝔽}
3. A : {Gamma, phi ⊢ _}
4. psi : {Gamma ⊢ _:𝔽}
5. B : {Gamma, psi ⊢ _}
6. I : fset(ℕ)
7. J : fset(ℕ)
8. f : J ⟶ I
9. rho : Gamma(I)
10. phi(rho) = 1 ∈ Point(face_lattice(I))
⊢ λc.if (phi(rho)==1) then (c rho f) else (c rho f) fi ∈ case-cube(phi;A;B;I;rho) ⟶ case-cube(phi;A;B;J;f(rho))
Latex:
Latex:
1. Gamma : CubicalSet\{j\}
2. phi : \{Gamma \mvdash{} \_:\mBbbF{}\}
3. A : \{Gamma, phi \mvdash{} \_\}
4. psi : \{Gamma \mvdash{} \_:\mBbbF{}\}
5. B : \{Gamma, psi \mvdash{} \_\}
\mvdash{} \mlambda{}I,J,f,rho,c. if (phi(rho)==1) then (c rho f) else (c rho f) fi \mmember{} I:fset(\mBbbN{})
{}\mrightarrow{} J:fset(\mBbbN{})
{}\mrightarrow{} f:J {}\mrightarrow{} I
{}\mrightarrow{} a:Gamma, phi(I)
{}\mrightarrow{} case-cube(phi;A;B;I;a)
{}\mrightarrow{} case-cube(phi;A;B;J;f(a))
By
Latex:
(RepeatFor 4 ((MemCD THENA Auto)) THEN RepUR ``context-subset`` -1 THEN D -1)
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