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Theorem fucof21 49834
Description: The morphism part of the functor composition bifunctor maps a hom-set of the product category into a set of natural transformations. (Contributed by Zhi Wang, 30-Sep-2025.)
Hypotheses
Ref Expression
fucof21.o (𝜑 → (⟨𝐶, 𝐷⟩ ∘F 𝐸) = ⟨𝑂, 𝑃⟩)
fucof21.t 𝑇 = ((𝐷 FuncCat 𝐸) ×c (𝐶 FuncCat 𝐷))
fucof21.j 𝐽 = (Hom ‘𝑇)
fucof21.w (𝜑𝑊 = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))
fucof21.u (𝜑𝑈𝑊)
fucof21.v (𝜑𝑉𝑊)
Assertion
Ref Expression
fucof21 (𝜑 → (𝑈𝑃𝑉):(𝑈𝐽𝑉)⟶((𝑂𝑈)(𝐶 Nat 𝐸)(𝑂𝑉)))

Proof of Theorem fucof21
Dummy variables 𝑎 𝑏 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fucof21.o . . 3 (𝜑 → (⟨𝐶, 𝐷⟩ ∘F 𝐸) = ⟨𝑂, 𝑃⟩)
2 fucof21.w . . . . 5 (𝜑𝑊 = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))
3 fucof21.u . . . . 5 (𝜑𝑈𝑊)
4 relfunc 17820 . . . . 5 Rel (𝐷 Func 𝐸)
5 relfunc 17820 . . . . 5 Rel (𝐶 Func 𝐷)
62, 3, 4, 5fuco2eld3 49802 . . . 4 (𝜑 → ((1st ‘(1st𝑈))(𝐷 Func 𝐸)(2nd ‘(1st𝑈)) ∧ (1st ‘(2nd𝑈))(𝐶 Func 𝐷)(2nd ‘(2nd𝑈))))
76simprd 495 . . 3 (𝜑 → (1st ‘(2nd𝑈))(𝐶 Func 𝐷)(2nd ‘(2nd𝑈)))
86simpld 494 . . 3 (𝜑 → (1st ‘(1st𝑈))(𝐷 Func 𝐸)(2nd ‘(1st𝑈)))
92, 3, 4, 5fuco2eld2 49801 . . 3 (𝜑𝑈 = ⟨⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩, ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩⟩)
10 fucof21.v . . . . 5 (𝜑𝑉𝑊)
112, 10, 4, 5fuco2eld3 49802 . . . 4 (𝜑 → ((1st ‘(1st𝑉))(𝐷 Func 𝐸)(2nd ‘(1st𝑉)) ∧ (1st ‘(2nd𝑉))(𝐶 Func 𝐷)(2nd ‘(2nd𝑉))))
1211simprd 495 . . 3 (𝜑 → (1st ‘(2nd𝑉))(𝐶 Func 𝐷)(2nd ‘(2nd𝑉)))
1311simpld 494 . . 3 (𝜑 → (1st ‘(1st𝑉))(𝐷 Func 𝐸)(2nd ‘(1st𝑉)))
142, 10, 4, 5fuco2eld2 49801 . . 3 (𝜑𝑉 = ⟨⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩, ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩⟩)
151, 7, 8, 9, 12, 13, 14fuco21 49823 . 2 (𝜑 → (𝑈𝑃𝑉) = (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩), 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩) ↦ (𝑥 ∈ (Base‘𝐶) ↦ ((𝑏‘((1st ‘(2nd𝑉))‘𝑥))(⟨((1st ‘(1st𝑈))‘((1st ‘(2nd𝑈))‘𝑥)), ((1st ‘(1st𝑈))‘((1st ‘(2nd𝑉))‘𝑥))⟩(comp‘𝐸)((1st ‘(1st𝑉))‘((1st ‘(2nd𝑉))‘𝑥)))((((1st ‘(2nd𝑈))‘𝑥)(2nd ‘(1st𝑈))((1st ‘(2nd𝑉))‘𝑥))‘(𝑎𝑥))))))
161adantr 480 . . . 4 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → (⟨𝐶, 𝐷⟩ ∘F 𝐸) = ⟨𝑂, 𝑃⟩)
179adantr 480 . . . 4 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → 𝑈 = ⟨⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩, ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩⟩)
1814adantr 480 . . . 4 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → 𝑉 = ⟨⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩, ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩⟩)
19 simprr 773 . . . 4 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))
20 simprl 771 . . . 4 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → 𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩))
2116, 17, 18, 19, 20fuco22 49826 . . 3 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → (𝑏(𝑈𝑃𝑉)𝑎) = (𝑥 ∈ (Base‘𝐶) ↦ ((𝑏‘((1st ‘(2nd𝑉))‘𝑥))(⟨((1st ‘(1st𝑈))‘((1st ‘(2nd𝑈))‘𝑥)), ((1st ‘(1st𝑈))‘((1st ‘(2nd𝑉))‘𝑥))⟩(comp‘𝐸)((1st ‘(1st𝑉))‘((1st ‘(2nd𝑉))‘𝑥)))((((1st ‘(2nd𝑈))‘𝑥)(2nd ‘(1st𝑈))((1st ‘(2nd𝑉))‘𝑥))‘(𝑎𝑥)))))
2216, 19, 20, 17, 18fuco22nat 49833 . . 3 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → (𝑏(𝑈𝑃𝑉)𝑎) ∈ ((𝑂𝑈)(𝐶 Nat 𝐸)(𝑂𝑉)))
2321, 22eqeltrrd 2838 . 2 ((𝜑 ∧ (𝑏 ∈ (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) ∧ 𝑎 ∈ (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))) → (𝑥 ∈ (Base‘𝐶) ↦ ((𝑏‘((1st ‘(2nd𝑉))‘𝑥))(⟨((1st ‘(1st𝑈))‘((1st ‘(2nd𝑈))‘𝑥)), ((1st ‘(1st𝑈))‘((1st ‘(2nd𝑉))‘𝑥))⟩(comp‘𝐸)((1st ‘(1st𝑉))‘((1st ‘(2nd𝑉))‘𝑥)))((((1st ‘(2nd𝑈))‘𝑥)(2nd ‘(1st𝑈))((1st ‘(2nd𝑉))‘𝑥))‘(𝑎𝑥)))) ∈ ((𝑂𝑈)(𝐶 Nat 𝐸)(𝑂𝑉)))
24 fucof21.t . . . 4 𝑇 = ((𝐷 FuncCat 𝐸) ×c (𝐶 FuncCat 𝐷))
2524xpcfucbas 49739 . . . 4 ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)) = (Base‘𝑇)
26 fucof21.j . . . 4 𝐽 = (Hom ‘𝑇)
273, 2eleqtrd 2839 . . . 4 (𝜑𝑈 ∈ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))
2810, 2eleqtrd 2839 . . . 4 (𝜑𝑉 ∈ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))
2924, 25, 26, 27, 28xpcfuchom 49741 . . 3 (𝜑 → (𝑈𝐽𝑉) = (((1st𝑈)(𝐷 Nat 𝐸)(1st𝑉)) × ((2nd𝑈)(𝐶 Nat 𝐷)(2nd𝑉))))
309fveq2d 6838 . . . . . 6 (𝜑 → (1st𝑈) = (1st ‘⟨⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩, ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩⟩))
31 opex 5411 . . . . . . 7 ⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩ ∈ V
32 opex 5411 . . . . . . 7 ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩ ∈ V
3331, 32op1st 7943 . . . . . 6 (1st ‘⟨⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩, ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩⟩) = ⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩
3430, 33eqtrdi 2788 . . . . 5 (𝜑 → (1st𝑈) = ⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩)
3514fveq2d 6838 . . . . . 6 (𝜑 → (1st𝑉) = (1st ‘⟨⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩, ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩⟩))
36 opex 5411 . . . . . . 7 ⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩ ∈ V
37 opex 5411 . . . . . . 7 ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩ ∈ V
3836, 37op1st 7943 . . . . . 6 (1st ‘⟨⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩, ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩⟩) = ⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩
3935, 38eqtrdi 2788 . . . . 5 (𝜑 → (1st𝑉) = ⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩)
4034, 39oveq12d 7378 . . . 4 (𝜑 → ((1st𝑈)(𝐷 Nat 𝐸)(1st𝑉)) = (⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩))
419fveq2d 6838 . . . . . 6 (𝜑 → (2nd𝑈) = (2nd ‘⟨⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩, ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩⟩))
4231, 32op2nd 7944 . . . . . 6 (2nd ‘⟨⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩, ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩⟩) = ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩
4341, 42eqtrdi 2788 . . . . 5 (𝜑 → (2nd𝑈) = ⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩)
4414fveq2d 6838 . . . . . 6 (𝜑 → (2nd𝑉) = (2nd ‘⟨⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩, ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩⟩))
4536, 37op2nd 7944 . . . . . 6 (2nd ‘⟨⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩, ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩⟩) = ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩
4644, 45eqtrdi 2788 . . . . 5 (𝜑 → (2nd𝑉) = ⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩)
4743, 46oveq12d 7378 . . . 4 (𝜑 → ((2nd𝑈)(𝐶 Nat 𝐷)(2nd𝑉)) = (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩))
4840, 47xpeq12d 5655 . . 3 (𝜑 → (((1st𝑈)(𝐷 Nat 𝐸)(1st𝑉)) × ((2nd𝑈)(𝐶 Nat 𝐷)(2nd𝑉))) = ((⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) × (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩)))
4929, 48eqtrd 2772 . 2 (𝜑 → (𝑈𝐽𝑉) = ((⟨(1st ‘(1st𝑈)), (2nd ‘(1st𝑈))⟩(𝐷 Nat 𝐸)⟨(1st ‘(1st𝑉)), (2nd ‘(1st𝑉))⟩) × (⟨(1st ‘(2nd𝑈)), (2nd ‘(2nd𝑈))⟩(𝐶 Nat 𝐷)⟨(1st ‘(2nd𝑉)), (2nd ‘(2nd𝑉))⟩)))
5015, 23, 49fmpodg 49356 1 (𝜑 → (𝑈𝑃𝑉):(𝑈𝐽𝑉)⟶((𝑂𝑈)(𝐶 Nat 𝐸)(𝑂𝑉)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1542  wcel 2114  cop 4574   class class class wbr 5086  cmpt 5167   × cxp 5622  wf 6488  cfv 6492  (class class class)co 7360  1st c1st 7933  2nd c2nd 7934  Basecbs 17170  Hom chom 17222  compcco 17223   Func cfunc 17812   Nat cnat 17902   FuncCat cfuc 17903   ×c cxpc 18125  F cfuco 49803
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5212  ax-sep 5231  ax-nul 5241  ax-pow 5302  ax-pr 5370  ax-un 7682  ax-cnex 11085  ax-resscn 11086  ax-1cn 11087  ax-icn 11088  ax-addcl 11089  ax-addrcl 11090  ax-mulcl 11091  ax-mulrcl 11092  ax-mulcom 11093  ax-addass 11094  ax-mulass 11095  ax-distr 11096  ax-i2m1 11097  ax-1ne0 11098  ax-1rid 11099  ax-rnegex 11100  ax-rrecex 11101  ax-cnre 11102  ax-pre-lttri 11103  ax-pre-lttrn 11104  ax-pre-ltadd 11105  ax-pre-mulgt0 11106
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3063  df-rmo 3343  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-pss 3910  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-tp 4573  df-op 4575  df-uni 4852  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-tr 5194  df-id 5519  df-eprel 5524  df-po 5532  df-so 5533  df-fr 5577  df-we 5579  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-pred 6259  df-ord 6320  df-on 6321  df-lim 6322  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-riota 7317  df-ov 7363  df-oprab 7364  df-mpo 7365  df-om 7811  df-1st 7935  df-2nd 7936  df-frecs 8224  df-wrecs 8255  df-recs 8304  df-rdg 8342  df-1o 8398  df-er 8636  df-map 8768  df-ixp 8839  df-en 8887  df-dom 8888  df-sdom 8889  df-fin 8890  df-pnf 11172  df-mnf 11173  df-xr 11174  df-ltxr 11175  df-le 11176  df-sub 11370  df-neg 11371  df-nn 12166  df-2 12235  df-3 12236  df-4 12237  df-5 12238  df-6 12239  df-7 12240  df-8 12241  df-9 12242  df-n0 12429  df-z 12516  df-dec 12636  df-uz 12780  df-fz 13453  df-struct 17108  df-slot 17143  df-ndx 17155  df-base 17171  df-hom 17235  df-cco 17236  df-cat 17625  df-cid 17626  df-func 17816  df-cofu 17818  df-nat 17904  df-fuc 17905  df-xpc 18129  df-fuco 49804
This theorem is referenced by:  fucofunc  49846
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