Theorem fuco22a 50284

Description: The morphism part of the functor composition bifunctor. See also fuco22 50273. (Contributed by Zhi Wang, 1-Oct-2025.)

Hypotheses

Ref	Expression
fuco22a.o	⊢ (𝜑 → (⟨𝐶, 𝐷⟩ ∘F 𝐸) = ⟨𝑂, 𝑃⟩)
fuco22a.u	⊢ (𝜑 → 𝑈 = ⟨𝐾, 𝐹⟩)
fuco22a.v	⊢ (𝜑 → 𝑉 = ⟨𝑅, 𝑀⟩)
fuco22a.a	⊢ (𝜑 → 𝐴 ∈ (𝐹(𝐶 Nat 𝐷)𝑀))
fuco22a.b	⊢ (𝜑 → 𝐵 ∈ (𝐾(𝐷 Nat 𝐸)𝑅))

Assertion

Ref	Expression
fuco22a	⊢ (𝜑 → (𝐵(𝑈𝑃𝑉)𝐴) = (𝑥 ∈ (Base‘𝐶) ↦ ((𝐵‘((1st ‘𝑀)‘𝑥))(⟨((1st ‘𝐾)‘((1st ‘𝐹)‘𝑥)), ((1st ‘𝐾)‘((1st ‘𝑀)‘𝑥))⟩(comp‘𝐸)((1st ‘𝑅)‘((1st ‘𝑀)‘𝑥)))((((1st ‘𝐹)‘𝑥)(2nd ‘𝐾)((1st ‘𝑀)‘𝑥))‘(𝐴‘𝑥)))))

Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐶   𝑥,𝐷   𝑥,𝐸   𝑥,𝐹   𝑥,𝐾   𝑥,𝑀   𝑥,𝑅   𝑥,𝑈   𝑥,𝑉   𝜑,𝑥

Allowed substitution hints:   𝑃(𝑥)   𝑂(𝑥)

Proof of Theorem fuco22a

Step	Hyp	Ref	Expression
1		fuco22a.o	. 2 ⊢ (𝜑 → (⟨𝐶, 𝐷⟩ ∘F 𝐸) = ⟨𝑂, 𝑃⟩)
2		fuco22a.u	. . 3 ⊢ (𝜑 → 𝑈 = ⟨𝐾, 𝐹⟩)
3		relfunc 17957	. . . . . . 7 ⊢ Rel (𝐷 Func 𝐸)
4		df-rel 5666	. . . . . . 7 ⊢ (Rel (𝐷 Func 𝐸) ↔ (𝐷 Func 𝐸) ⊆ (V × V))
5	3, 4	mpbi 233	. . . . . 6 ⊢ (𝐷 Func 𝐸) ⊆ (V × V)
6		fuco22a.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ (𝐾(𝐷 Nat 𝐸)𝑅))
7		eqid 2762	. . . . . . . . 9 ⊢ (𝐷 Nat 𝐸) = (𝐷 Nat 𝐸)
8	7	natrcl 18048	. . . . . . . 8 ⊢ (𝐵 ∈ (𝐾(𝐷 Nat 𝐸)𝑅) → (𝐾 ∈ (𝐷 Func 𝐸) ∧ 𝑅 ∈ (𝐷 Func 𝐸)))
9	6, 8	syl 18	. . . . . . 7 ⊢ (𝜑 → (𝐾 ∈ (𝐷 Func 𝐸) ∧ 𝑅 ∈ (𝐷 Func 𝐸)))
10	9	simpld 500	. . . . . 6 ⊢ (𝜑 → 𝐾 ∈ (𝐷 Func 𝐸))
11	5, 10	sselid 3932	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ (V × V))
12		1st2ndb 8030	. . . . 5 ⊢ (𝐾 ∈ (V × V) ↔ 𝐾 = ⟨(1st ‘𝐾), (2nd ‘𝐾)⟩)
13	11, 12	sylib 221	. . . 4 ⊢ (𝜑 → 𝐾 = ⟨(1st ‘𝐾), (2nd ‘𝐾)⟩)
14		relfunc 17957	. . . . . . 7 ⊢ Rel (𝐶 Func 𝐷)
15		df-rel 5666	. . . . . . 7 ⊢ (Rel (𝐶 Func 𝐷) ↔ (𝐶 Func 𝐷) ⊆ (V × V))
16	14, 15	mpbi 233	. . . . . 6 ⊢ (𝐶 Func 𝐷) ⊆ (V × V)
17		fuco22a.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ (𝐹(𝐶 Nat 𝐷)𝑀))
18		eqid 2762	. . . . . . . . 9 ⊢ (𝐶 Nat 𝐷) = (𝐶 Nat 𝐷)
19	18	natrcl 18048	. . . . . . . 8 ⊢ (𝐴 ∈ (𝐹(𝐶 Nat 𝐷)𝑀) → (𝐹 ∈ (𝐶 Func 𝐷) ∧ 𝑀 ∈ (𝐶 Func 𝐷)))
20	17, 19	syl 18	. . . . . . 7 ⊢ (𝜑 → (𝐹 ∈ (𝐶 Func 𝐷) ∧ 𝑀 ∈ (𝐶 Func 𝐷)))
21	20	simpld 500	. . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷))
22	16, 21	sselid 3932	. . . . 5 ⊢ (𝜑 → 𝐹 ∈ (V × V))
23		1st2ndb 8030	. . . . 5 ⊢ (𝐹 ∈ (V × V) ↔ 𝐹 = ⟨(1st ‘𝐹), (2nd ‘𝐹)⟩)
24	22, 23	sylib 221	. . . 4 ⊢ (𝜑 → 𝐹 = ⟨(1st ‘𝐹), (2nd ‘𝐹)⟩)
25	13, 24	opeq12d 4844	. . 3 ⊢ (𝜑 → ⟨𝐾, 𝐹⟩ = ⟨⟨(1st ‘𝐾), (2nd ‘𝐾)⟩, ⟨(1st ‘𝐹), (2nd ‘𝐹)⟩⟩)
26	2, 25	eqtrd 2797	. 2 ⊢ (𝜑 → 𝑈 = ⟨⟨(1st ‘𝐾), (2nd ‘𝐾)⟩, ⟨(1st ‘𝐹), (2nd ‘𝐹)⟩⟩)
27		fuco22a.v	. . 3 ⊢ (𝜑 → 𝑉 = ⟨𝑅, 𝑀⟩)
28	9	simprd 501	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ (𝐷 Func 𝐸))
29	5, 28	sselid 3932	. . . . 5 ⊢ (𝜑 → 𝑅 ∈ (V × V))
30		1st2ndb 8030	. . . . 5 ⊢ (𝑅 ∈ (V × V) ↔ 𝑅 = ⟨(1st ‘𝑅), (2nd ‘𝑅)⟩)
31	29, 30	sylib 221	. . . 4 ⊢ (𝜑 → 𝑅 = ⟨(1st ‘𝑅), (2nd ‘𝑅)⟩)
32	20	simprd 501	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ (𝐶 Func 𝐷))
33	16, 32	sselid 3932	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ (V × V))
34		1st2ndb 8030	. . . . 5 ⊢ (𝑀 ∈ (V × V) ↔ 𝑀 = ⟨(1st ‘𝑀), (2nd ‘𝑀)⟩)
35	33, 34	sylib 221	. . . 4 ⊢ (𝜑 → 𝑀 = ⟨(1st ‘𝑀), (2nd ‘𝑀)⟩)
36	31, 35	opeq12d 4844	. . 3 ⊢ (𝜑 → ⟨𝑅, 𝑀⟩ = ⟨⟨(1st ‘𝑅), (2nd ‘𝑅)⟩, ⟨(1st ‘𝑀), (2nd ‘𝑀)⟩⟩)
37	27, 36	eqtrd 2797	. 2 ⊢ (𝜑 → 𝑉 = ⟨⟨(1st ‘𝑅), (2nd ‘𝑅)⟩, ⟨(1st ‘𝑀), (2nd ‘𝑀)⟩⟩)
38	18, 17	nat1st2nd 18049	. 2 ⊢ (𝜑 → 𝐴 ∈ (⟨(1st ‘𝐹), (2nd ‘𝐹)⟩(𝐶 Nat 𝐷)⟨(1st ‘𝑀), (2nd ‘𝑀)⟩))
39	7, 6	nat1st2nd 18049	. 2 ⊢ (𝜑 → 𝐵 ∈ (⟨(1st ‘𝐾), (2nd ‘𝐾)⟩(𝐷 Nat 𝐸)⟨(1st ‘𝑅), (2nd ‘𝑅)⟩))
40	1, 26, 37, 38, 39	fuco22 50273	1 ⊢ (𝜑 → (𝐵(𝑈𝑃𝑉)𝐴) = (𝑥 ∈ (Base‘𝐶) ↦ ((𝐵‘((1st ‘𝑀)‘𝑥))(⟨((1st ‘𝐾)‘((1st ‘𝐹)‘𝑥)), ((1st ‘𝐾)‘((1st ‘𝑀)‘𝑥))⟩(comp‘𝐸)((1st ‘𝑅)‘((1st ‘𝑀)‘𝑥)))((((1st ‘𝐹)‘𝑥)(2nd ‘𝐾)((1st ‘𝑀)‘𝑥))‘(𝐴‘𝑥)))))

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2145  Vcvv 3453   ⊆ wss 3902  ⟨cop 4593   ↦ cmpt 5190   × cxp 5657  Rel wrel 5664  ‘cfv 6537  (class class class)co 7417  1^st c1st 7988  2^nd c2nd 7989  Basecbs 17307  compcco 17360   Func cfunc 17949   Nat cnat 18039   ∘_F cfuco 50250

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2734  ax-rep 5236  ax-sep 5255  ax-nul 5267  ax-pow 5334  ax-pr 5402  ax-un 7740

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3079  df-rex 3089  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3743  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-pw 4562  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-iun 4956  df-br 5108  df-opab 5172  df-mpt 5191  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-ov 7420  df-oprab 7421  df-mpo 7422  df-1st 7990  df-2nd 7991  df-ixp 8909  df-func 17953  df-cofu 17955  df-nat 18041  df-fuco 50251

This theorem is used by:  fucocolem2  50288  fucocolem4  50290  fucolid  50295  fucorid  50296  precofvalALT  50302