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Theorem fucval 17277

Description: Value of the functor category. (Contributed by Mario Carneiro, 6-Jan-2017.)

**Hypotheses**
Ref	Expression
fucval.q	⊢ 𝑄 = (𝐶 FuncCat 𝐷)
fucval.b	⊢ 𝐵 = (𝐶 Func 𝐷)
fucval.n	⊢ 𝑁 = (𝐶 Nat 𝐷)
fucval.a	⊢ 𝐴 = (Base‘𝐶)
fucval.o	⊢ · = (comp‘𝐷)
fucval.c	⊢ (𝜑 → 𝐶 ∈ Cat)
fucval.d	⊢ (𝜑 → 𝐷 ∈ Cat)
fucval.x	⊢ (𝜑 → ∙ = (𝑣 ∈ (𝐵 × 𝐵), ℎ ∈ 𝐵 ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))))

**Assertion**
Ref	Expression
fucval	⊢ (𝜑 → 𝑄 = {⟨(Base‘ndx), 𝐵⟩, ⟨(Hom ‘ndx), 𝑁⟩, ⟨(comp‘ndx), ∙ ⟩})

Distinct variable groups: 𝑣,ℎ,𝐵 𝑎,𝑏,𝑓,𝑔,ℎ,𝑣,𝑥,𝜑 𝐶,𝑎,𝑏,𝑓,𝑔,ℎ,𝑣,𝑥 𝐷,𝑎,𝑏,𝑓,𝑔,ℎ,𝑣,𝑥 Allowed substitution hints: 𝐴(𝑥,𝑣,𝑓,𝑔,ℎ,𝑎,𝑏) 𝐵(𝑥,𝑓,𝑔,𝑎,𝑏) 𝑄(𝑥,𝑣,𝑓,𝑔,ℎ,𝑎,𝑏) ∙ (𝑥,𝑣,𝑓,𝑔,ℎ,𝑎,𝑏) · (𝑥,𝑣,𝑓,𝑔,ℎ,𝑎,𝑏) 𝑁(𝑥,𝑣,𝑓,𝑔,ℎ,𝑎,𝑏)

Proof of Theorem fucval Dummy variables 𝑡 𝑢 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fucval.q	. 2 ⊢ 𝑄 = (𝐶 FuncCat 𝐷)
2		df-fuc 17263	. . . 4 ⊢ FuncCat = (𝑡 ∈ Cat, 𝑢 ∈ Cat ↦ {⟨(Base‘ndx), (𝑡 Func 𝑢)⟩, ⟨(Hom ‘ndx), (𝑡 Nat 𝑢)⟩, ⟨(comp‘ndx), (𝑣 ∈ ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)), ℎ ∈ (𝑡 Func 𝑢) ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))⟩})
3	2	a1i 11	. . 3 ⊢ (𝜑 → FuncCat = (𝑡 ∈ Cat, 𝑢 ∈ Cat ↦ {⟨(Base‘ndx), (𝑡 Func 𝑢)⟩, ⟨(Hom ‘ndx), (𝑡 Nat 𝑢)⟩, ⟨(comp‘ndx), (𝑣 ∈ ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)), ℎ ∈ (𝑡 Func 𝑢) ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))⟩}))
4		simprl 771	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → 𝑡 = 𝐶)
5		simprr 773	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → 𝑢 = 𝐷)
6	4, 5	oveq12d 7166	. . . . . 6 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑡 Func 𝑢) = (𝐶 Func 𝐷))
7		fucval.b	. . . . . 6 ⊢ 𝐵 = (𝐶 Func 𝐷)
8	6, 7	eqtr4di 2812	. . . . 5 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑡 Func 𝑢) = 𝐵)
9	8	opeq2d 4768	. . . 4 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ⟨(Base‘ndx), (𝑡 Func 𝑢)⟩ = ⟨(Base‘ndx), 𝐵⟩)
10	4, 5	oveq12d 7166	. . . . . 6 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑡 Nat 𝑢) = (𝐶 Nat 𝐷))
11		fucval.n	. . . . . 6 ⊢ 𝑁 = (𝐶 Nat 𝐷)
12	10, 11	eqtr4di 2812	. . . . 5 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑡 Nat 𝑢) = 𝑁)
13	12	opeq2d 4768	. . . 4 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ⟨(Hom ‘ndx), (𝑡 Nat 𝑢)⟩ = ⟨(Hom ‘ndx), 𝑁⟩)
14	8	sqxpeqd 5554	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)) = (𝐵 × 𝐵))
15	12	oveqd 7165	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑔(𝑡 Nat 𝑢)ℎ) = (𝑔𝑁ℎ))
16	12	oveqd 7165	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑓(𝑡 Nat 𝑢)𝑔) = (𝑓𝑁𝑔))
17	4	fveq2d 6660	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (Base‘𝑡) = (Base‘𝐶))
18		fucval.a	. . . . . . . . . . . 12 ⊢ 𝐴 = (Base‘𝐶)
19	17, 18	eqtr4di 2812	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (Base‘𝑡) = 𝐴)
20	5	fveq2d 6660	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (comp‘𝑢) = (comp‘𝐷))
21		fucval.o	. . . . . . . . . . . . . 14 ⊢ · = (comp‘𝐷)
22	20, 21	eqtr4di 2812	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (comp‘𝑢) = · )
23	22	oveqd 7165	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥)) = (⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥)))
24	23	oveqd 7165	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)) = ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))
25	19, 24	mpteq12dv 5115	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))) = (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))
26	15, 16, 25	mpoeq123dv 7221	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))) = (𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))
27	26	csbeq2dv 3813	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))) = ⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))
28	27	csbeq2dv 3813	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))) = ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))
29	14, 8, 28	mpoeq123dv 7221	. . . . . 6 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑣 ∈ ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)), ℎ ∈ (𝑡 Func 𝑢) ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))) = (𝑣 ∈ (𝐵 × 𝐵), ℎ ∈ 𝐵 ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))))
30		fucval.x	. . . . . . 7 ⊢ (𝜑 → ∙ = (𝑣 ∈ (𝐵 × 𝐵), ℎ ∈ 𝐵 ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))))
31	30	adantr 485	. . . . . 6 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ∙ = (𝑣 ∈ (𝐵 × 𝐵), ℎ ∈ 𝐵 ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ 𝐴 ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩ · ((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))))
32	29, 31	eqtr4d 2797	. . . . 5 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → (𝑣 ∈ ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)), ℎ ∈ (𝑡 Func 𝑢) ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥))))) = ∙ )
33	32	opeq2d 4768	. . . 4 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → ⟨(comp‘ndx), (𝑣 ∈ ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)), ℎ ∈ (𝑡 Func 𝑢) ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))⟩ = ⟨(comp‘ndx), ∙ ⟩)
34	9, 13, 33	tpeq123d 4639	. . 3 ⊢ ((𝜑 ∧ (𝑡 = 𝐶 ∧ 𝑢 = 𝐷)) → {⟨(Base‘ndx), (𝑡 Func 𝑢)⟩, ⟨(Hom ‘ndx), (𝑡 Nat 𝑢)⟩, ⟨(comp‘ndx), (𝑣 ∈ ((𝑡 Func 𝑢) × (𝑡 Func 𝑢)), ℎ ∈ (𝑡 Func 𝑢) ↦ ⦋(1^st ‘𝑣) / 𝑓⦌⦋(2^nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔(𝑡 Nat 𝑢)ℎ), 𝑎 ∈ (𝑓(𝑡 Nat 𝑢)𝑔) ↦ (𝑥 ∈ (Base‘𝑡) ↦ ((𝑏‘𝑥)(⟨((1^st ‘𝑓)‘𝑥), ((1^st ‘𝑔)‘𝑥)⟩(comp‘𝑢)((1^st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))⟩} = {⟨(Base‘ndx), 𝐵⟩, ⟨(Hom ‘ndx), 𝑁⟩, ⟨(comp‘ndx), ∙ ⟩})
35		fucval.c	. . 3 ⊢ (𝜑 → 𝐶 ∈ Cat)
36		fucval.d	. . 3 ⊢ (𝜑 → 𝐷 ∈ Cat)
37		tpex 7466	. . . 4 ⊢ {⟨(Base‘ndx), 𝐵⟩, ⟨(Hom ‘ndx), 𝑁⟩, ⟨(comp‘ndx), ∙ ⟩} ∈ V
38	37	a1i 11	. . 3 ⊢ (𝜑 → {⟨(Base‘ndx), 𝐵⟩, ⟨(Hom ‘ndx), 𝑁⟩, ⟨(comp‘ndx), ∙ ⟩} ∈ V)
39	3, 34, 35, 36, 38	ovmpod 7295	. 2 ⊢ (𝜑 → (𝐶 FuncCat 𝐷) = {⟨(Base‘ndx), 𝐵⟩, ⟨(Hom ‘ndx), 𝑁⟩, ⟨(comp‘ndx), ∙ ⟩})
40	1, 39	syl5eq 2806	1 ⊢ (𝜑 → 𝑄 = {⟨(Base‘ndx), 𝐵⟩, ⟨(Hom ‘ndx), 𝑁⟩, ⟨(comp‘ndx), ∙ ⟩})

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 400 = wceq 1539 ∈ wcel 2112 Vcvv 3410 ⦋csb 3806 {ctp 4524 ⟨cop 4526 ↦ cmpt 5110 × cxp 5520 ‘cfv 6333 (class class class)co 7148 ∈ cmpo 7150 1^st c1st 7689 2^nd c2nd 7690 ndxcnx 16528 Basecbs 16531 Hom chom 16624 compcco 16625 Catccat 16983 Func cfunc 17173 Nat cnat 17260 FuncCat cfuc 17261

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-sep 5167 ax-nul 5174 ax-pr 5296 ax-un 7457

This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3an 1087 df-tru 1542 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2902 df-ral 3076 df-rex 3077 df-v 3412 df-sbc 3698 df-csb 3807 df-dif 3862 df-un 3864 df-in 3866 df-ss 3876 df-nul 4227 df-if 4419 df-sn 4521 df-pr 4523 df-tp 4525 df-op 4527 df-uni 4797 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5428 df-xp 5528 df-rel 5529 df-cnv 5530 df-co 5531 df-dm 5532 df-iota 6292 df-fun 6335 df-fv 6341 df-ov 7151 df-oprab 7152 df-mpo 7153 df-fuc 17263

This theorem is referenced by: fuccofval 17278 fucbas 17279 fuchom 17280 fucpropd 17296 catcfuccl 17425

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