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Theorem funcres 16603
Description: A functor restricted to a subcategory is a functor. (Contributed by Mario Carneiro, 6-Jan-2017.)
Hypotheses
Ref Expression
funcres.f (𝜑𝐹 ∈ (𝐶 Func 𝐷))
funcres.h (𝜑𝐻 ∈ (Subcat‘𝐶))
Assertion
Ref Expression
funcres (𝜑 → (𝐹f 𝐻) ∈ ((𝐶cat 𝐻) Func 𝐷))

Proof of Theorem funcres
Dummy variables 𝑓 𝑔 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 funcres.f . . . 4 (𝜑𝐹 ∈ (𝐶 Func 𝐷))
2 funcres.h . . . 4 (𝜑𝐻 ∈ (Subcat‘𝐶))
31, 2resfval 16599 . . 3 (𝜑 → (𝐹f 𝐻) = ⟨((1st𝐹) ↾ dom dom 𝐻), (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)))⟩)
43fveq2d 6233 . . . . 5 (𝜑 → (2nd ‘(𝐹f 𝐻)) = (2nd ‘⟨((1st𝐹) ↾ dom dom 𝐻), (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)))⟩))
5 fvex 6239 . . . . . . 7 (1st𝐹) ∈ V
65resex 5478 . . . . . 6 ((1st𝐹) ↾ dom dom 𝐻) ∈ V
7 dmexg 7139 . . . . . . 7 (𝐻 ∈ (Subcat‘𝐶) → dom 𝐻 ∈ V)
8 mptexg 6525 . . . . . . 7 (dom 𝐻 ∈ V → (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) ∈ V)
92, 7, 83syl 18 . . . . . 6 (𝜑 → (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) ∈ V)
10 op2ndg 7223 . . . . . 6 ((((1st𝐹) ↾ dom dom 𝐻) ∈ V ∧ (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) ∈ V) → (2nd ‘⟨((1st𝐹) ↾ dom dom 𝐻), (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)))⟩) = (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))))
116, 9, 10sylancr 696 . . . . 5 (𝜑 → (2nd ‘⟨((1st𝐹) ↾ dom dom 𝐻), (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)))⟩) = (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))))
124, 11eqtrd 2685 . . . 4 (𝜑 → (2nd ‘(𝐹f 𝐻)) = (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))))
1312opeq2d 4440 . . 3 (𝜑 → ⟨((1st𝐹) ↾ dom dom 𝐻), (2nd ‘(𝐹f 𝐻))⟩ = ⟨((1st𝐹) ↾ dom dom 𝐻), (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)))⟩)
143, 13eqtr4d 2688 . 2 (𝜑 → (𝐹f 𝐻) = ⟨((1st𝐹) ↾ dom dom 𝐻), (2nd ‘(𝐹f 𝐻))⟩)
15 eqid 2651 . . . 4 (Base‘(𝐶cat 𝐻)) = (Base‘(𝐶cat 𝐻))
16 eqid 2651 . . . 4 (Base‘𝐷) = (Base‘𝐷)
17 eqid 2651 . . . 4 (Hom ‘(𝐶cat 𝐻)) = (Hom ‘(𝐶cat 𝐻))
18 eqid 2651 . . . 4 (Hom ‘𝐷) = (Hom ‘𝐷)
19 eqid 2651 . . . 4 (Id‘(𝐶cat 𝐻)) = (Id‘(𝐶cat 𝐻))
20 eqid 2651 . . . 4 (Id‘𝐷) = (Id‘𝐷)
21 eqid 2651 . . . 4 (comp‘(𝐶cat 𝐻)) = (comp‘(𝐶cat 𝐻))
22 eqid 2651 . . . 4 (comp‘𝐷) = (comp‘𝐷)
23 eqid 2651 . . . . 5 (𝐶cat 𝐻) = (𝐶cat 𝐻)
2423, 2subccat 16555 . . . 4 (𝜑 → (𝐶cat 𝐻) ∈ Cat)
25 funcrcl 16570 . . . . . 6 (𝐹 ∈ (𝐶 Func 𝐷) → (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat))
261, 25syl 17 . . . . 5 (𝜑 → (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat))
2726simprd 478 . . . 4 (𝜑𝐷 ∈ Cat)
28 eqid 2651 . . . . . . 7 (Base‘𝐶) = (Base‘𝐶)
29 relfunc 16569 . . . . . . . 8 Rel (𝐶 Func 𝐷)
30 1st2ndbr 7261 . . . . . . . 8 ((Rel (𝐶 Func 𝐷) ∧ 𝐹 ∈ (𝐶 Func 𝐷)) → (1st𝐹)(𝐶 Func 𝐷)(2nd𝐹))
3129, 1, 30sylancr 696 . . . . . . 7 (𝜑 → (1st𝐹)(𝐶 Func 𝐷)(2nd𝐹))
3228, 16, 31funcf1 16573 . . . . . 6 (𝜑 → (1st𝐹):(Base‘𝐶)⟶(Base‘𝐷))
33 eqidd 2652 . . . . . . . 8 (𝜑 → dom dom 𝐻 = dom dom 𝐻)
342, 33subcfn 16548 . . . . . . 7 (𝜑𝐻 Fn (dom dom 𝐻 × dom dom 𝐻))
352, 34, 28subcss1 16549 . . . . . 6 (𝜑 → dom dom 𝐻 ⊆ (Base‘𝐶))
3632, 35fssresd 6109 . . . . 5 (𝜑 → ((1st𝐹) ↾ dom dom 𝐻):dom dom 𝐻⟶(Base‘𝐷))
3726simpld 474 . . . . . . 7 (𝜑𝐶 ∈ Cat)
3823, 28, 37, 34, 35rescbas 16536 . . . . . 6 (𝜑 → dom dom 𝐻 = (Base‘(𝐶cat 𝐻)))
3938feq2d 6069 . . . . 5 (𝜑 → (((1st𝐹) ↾ dom dom 𝐻):dom dom 𝐻⟶(Base‘𝐷) ↔ ((1st𝐹) ↾ dom dom 𝐻):(Base‘(𝐶cat 𝐻))⟶(Base‘𝐷)))
4036, 39mpbid 222 . . . 4 (𝜑 → ((1st𝐹) ↾ dom dom 𝐻):(Base‘(𝐶cat 𝐻))⟶(Base‘𝐷))
41 fvex 6239 . . . . . . 7 ((2nd𝐹)‘𝑧) ∈ V
4241resex 5478 . . . . . 6 (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)) ∈ V
43 eqid 2651 . . . . . 6 (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) = (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧)))
4442, 43fnmpti 6060 . . . . 5 (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) Fn dom 𝐻
4512eqcomd 2657 . . . . . 6 (𝜑 → (𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) = (2nd ‘(𝐹f 𝐻)))
46 fndm 6028 . . . . . . . 8 (𝐻 Fn (dom dom 𝐻 × dom dom 𝐻) → dom 𝐻 = (dom dom 𝐻 × dom dom 𝐻))
4734, 46syl 17 . . . . . . 7 (𝜑 → dom 𝐻 = (dom dom 𝐻 × dom dom 𝐻))
4838sqxpeqd 5175 . . . . . . 7 (𝜑 → (dom dom 𝐻 × dom dom 𝐻) = ((Base‘(𝐶cat 𝐻)) × (Base‘(𝐶cat 𝐻))))
4947, 48eqtrd 2685 . . . . . 6 (𝜑 → dom 𝐻 = ((Base‘(𝐶cat 𝐻)) × (Base‘(𝐶cat 𝐻))))
5045, 49fneq12d 6021 . . . . 5 (𝜑 → ((𝑧 ∈ dom 𝐻 ↦ (((2nd𝐹)‘𝑧) ↾ (𝐻𝑧))) Fn dom 𝐻 ↔ (2nd ‘(𝐹f 𝐻)) Fn ((Base‘(𝐶cat 𝐻)) × (Base‘(𝐶cat 𝐻)))))
5144, 50mpbii 223 . . . 4 (𝜑 → (2nd ‘(𝐹f 𝐻)) Fn ((Base‘(𝐶cat 𝐻)) × (Base‘(𝐶cat 𝐻))))
52 eqid 2651 . . . . . . . 8 (Hom ‘𝐶) = (Hom ‘𝐶)
5331adantr 480 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (1st𝐹)(𝐶 Func 𝐷)(2nd𝐹))
5435adantr 480 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → dom dom 𝐻 ⊆ (Base‘𝐶))
55 simprl 809 . . . . . . . . . 10 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝑥 ∈ (Base‘(𝐶cat 𝐻)))
5638adantr 480 . . . . . . . . . 10 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → dom dom 𝐻 = (Base‘(𝐶cat 𝐻)))
5755, 56eleqtrrd 2733 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝑥 ∈ dom dom 𝐻)
5854, 57sseldd 3637 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝑥 ∈ (Base‘𝐶))
59 simprr 811 . . . . . . . . . 10 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝑦 ∈ (Base‘(𝐶cat 𝐻)))
6059, 56eleqtrrd 2733 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝑦 ∈ dom dom 𝐻)
6154, 60sseldd 3637 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝑦 ∈ (Base‘𝐶))
6228, 52, 18, 53, 58, 61funcf2 16575 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (𝑥(2nd𝐹)𝑦):(𝑥(Hom ‘𝐶)𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)))
632adantr 480 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝐻 ∈ (Subcat‘𝐶))
6434adantr 480 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝐻 Fn (dom dom 𝐻 × dom dom 𝐻))
6563, 64, 52, 57, 60subcss2 16550 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (𝑥𝐻𝑦) ⊆ (𝑥(Hom ‘𝐶)𝑦))
6662, 65fssresd 6109 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → ((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦)):(𝑥𝐻𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)))
671adantr 480 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝐹 ∈ (𝐶 Func 𝐷))
6867, 63, 64, 57, 60resf2nd 16602 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (𝑥(2nd ‘(𝐹f 𝐻))𝑦) = ((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦)))
6968feq1d 6068 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑦):(𝑥𝐻𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)) ↔ ((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦)):(𝑥𝐻𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦))))
7066, 69mpbird 247 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (𝑥(2nd ‘(𝐹f 𝐻))𝑦):(𝑥𝐻𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)))
7123, 28, 37, 34, 35reschom 16537 . . . . . . . 8 (𝜑𝐻 = (Hom ‘(𝐶cat 𝐻)))
7271adantr 480 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → 𝐻 = (Hom ‘(𝐶cat 𝐻)))
7372oveqd 6707 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (𝑥𝐻𝑦) = (𝑥(Hom ‘(𝐶cat 𝐻))𝑦))
74 fvres 6245 . . . . . . . . 9 (𝑥 ∈ dom dom 𝐻 → (((1st𝐹) ↾ dom dom 𝐻)‘𝑥) = ((1st𝐹)‘𝑥))
7557, 74syl 17 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (((1st𝐹) ↾ dom dom 𝐻)‘𝑥) = ((1st𝐹)‘𝑥))
76 fvres 6245 . . . . . . . . 9 (𝑦 ∈ dom dom 𝐻 → (((1st𝐹) ↾ dom dom 𝐻)‘𝑦) = ((1st𝐹)‘𝑦))
7760, 76syl 17 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (((1st𝐹) ↾ dom dom 𝐻)‘𝑦) = ((1st𝐹)‘𝑦))
7875, 77oveq12d 6708 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → ((((1st𝐹) ↾ dom dom 𝐻)‘𝑥)(Hom ‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑦)) = (((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)))
7978eqcomd 2657 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)) = ((((1st𝐹) ↾ dom dom 𝐻)‘𝑥)(Hom ‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑦)))
8073, 79feq23d 6078 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑦):(𝑥𝐻𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)) ↔ (𝑥(2nd ‘(𝐹f 𝐻))𝑦):(𝑥(Hom ‘(𝐶cat 𝐻))𝑦)⟶((((1st𝐹) ↾ dom dom 𝐻)‘𝑥)(Hom ‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑦))))
8170, 80mpbid 222 . . . 4 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)))) → (𝑥(2nd ‘(𝐹f 𝐻))𝑦):(𝑥(Hom ‘(𝐶cat 𝐻))𝑦)⟶((((1st𝐹) ↾ dom dom 𝐻)‘𝑥)(Hom ‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑦)))
821adantr 480 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → 𝐹 ∈ (𝐶 Func 𝐷))
832adantr 480 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → 𝐻 ∈ (Subcat‘𝐶))
8434adantr 480 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → 𝐻 Fn (dom dom 𝐻 × dom dom 𝐻))
8538eleq2d 2716 . . . . . . . 8 (𝜑 → (𝑥 ∈ dom dom 𝐻𝑥 ∈ (Base‘(𝐶cat 𝐻))))
8685biimpar 501 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → 𝑥 ∈ dom dom 𝐻)
8782, 83, 84, 86, 86resf2nd 16602 . . . . . 6 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → (𝑥(2nd ‘(𝐹f 𝐻))𝑥) = ((𝑥(2nd𝐹)𝑥) ↾ (𝑥𝐻𝑥)))
88 eqid 2651 . . . . . . . 8 (Id‘𝐶) = (Id‘𝐶)
8923, 83, 84, 88, 86subcid 16554 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((Id‘𝐶)‘𝑥) = ((Id‘(𝐶cat 𝐻))‘𝑥))
9089eqcomd 2657 . . . . . 6 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((Id‘(𝐶cat 𝐻))‘𝑥) = ((Id‘𝐶)‘𝑥))
9187, 90fveq12d 6235 . . . . 5 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑥)‘((Id‘(𝐶cat 𝐻))‘𝑥)) = (((𝑥(2nd𝐹)𝑥) ↾ (𝑥𝐻𝑥))‘((Id‘𝐶)‘𝑥)))
9231adantr 480 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → (1st𝐹)(𝐶 Func 𝐷)(2nd𝐹))
9338, 35eqsstr3d 3673 . . . . . . . 8 (𝜑 → (Base‘(𝐶cat 𝐻)) ⊆ (Base‘𝐶))
9493sselda 3636 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → 𝑥 ∈ (Base‘𝐶))
9528, 88, 20, 92, 94funcid 16577 . . . . . 6 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((𝑥(2nd𝐹)𝑥)‘((Id‘𝐶)‘𝑥)) = ((Id‘𝐷)‘((1st𝐹)‘𝑥)))
9683, 84, 86, 88subcidcl 16551 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((Id‘𝐶)‘𝑥) ∈ (𝑥𝐻𝑥))
97 fvres 6245 . . . . . . 7 (((Id‘𝐶)‘𝑥) ∈ (𝑥𝐻𝑥) → (((𝑥(2nd𝐹)𝑥) ↾ (𝑥𝐻𝑥))‘((Id‘𝐶)‘𝑥)) = ((𝑥(2nd𝐹)𝑥)‘((Id‘𝐶)‘𝑥)))
9896, 97syl 17 . . . . . 6 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → (((𝑥(2nd𝐹)𝑥) ↾ (𝑥𝐻𝑥))‘((Id‘𝐶)‘𝑥)) = ((𝑥(2nd𝐹)𝑥)‘((Id‘𝐶)‘𝑥)))
9986, 74syl 17 . . . . . . 7 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → (((1st𝐹) ↾ dom dom 𝐻)‘𝑥) = ((1st𝐹)‘𝑥))
10099fveq2d 6233 . . . . . 6 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((Id‘𝐷)‘(((1st𝐹) ↾ dom dom 𝐻)‘𝑥)) = ((Id‘𝐷)‘((1st𝐹)‘𝑥)))
10195, 98, 1003eqtr4d 2695 . . . . 5 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → (((𝑥(2nd𝐹)𝑥) ↾ (𝑥𝐻𝑥))‘((Id‘𝐶)‘𝑥)) = ((Id‘𝐷)‘(((1st𝐹) ↾ dom dom 𝐻)‘𝑥)))
10291, 101eqtrd 2685 . . . 4 ((𝜑𝑥 ∈ (Base‘(𝐶cat 𝐻))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑥)‘((Id‘(𝐶cat 𝐻))‘𝑥)) = ((Id‘𝐷)‘(((1st𝐹) ↾ dom dom 𝐻)‘𝑥)))
10323ad2ant1 1102 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝐻 ∈ (Subcat‘𝐶))
104343ad2ant1 1102 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝐻 Fn (dom dom 𝐻 × dom dom 𝐻))
105 simp21 1114 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑥 ∈ (Base‘(𝐶cat 𝐻)))
106383ad2ant1 1102 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → dom dom 𝐻 = (Base‘(𝐶cat 𝐻)))
107105, 106eleqtrrd 2733 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑥 ∈ dom dom 𝐻)
108 eqid 2651 . . . . . . . 8 (comp‘𝐶) = (comp‘𝐶)
109 simp22 1115 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑦 ∈ (Base‘(𝐶cat 𝐻)))
110109, 106eleqtrrd 2733 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑦 ∈ dom dom 𝐻)
111 simp23 1116 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑧 ∈ (Base‘(𝐶cat 𝐻)))
112111, 106eleqtrrd 2733 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑧 ∈ dom dom 𝐻)
113 simp3l 1109 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦))
114713ad2ant1 1102 . . . . . . . . . 10 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝐻 = (Hom ‘(𝐶cat 𝐻)))
115114oveqd 6707 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑥𝐻𝑦) = (𝑥(Hom ‘(𝐶cat 𝐻))𝑦))
116113, 115eleqtrrd 2733 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑓 ∈ (𝑥𝐻𝑦))
117 simp3r 1110 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))
118114oveqd 6707 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑦𝐻𝑧) = (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))
119117, 118eleqtrrd 2733 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑔 ∈ (𝑦𝐻𝑧))
120103, 104, 107, 108, 110, 112, 116, 119subccocl 16552 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓) ∈ (𝑥𝐻𝑧))
121 fvres 6245 . . . . . . 7 ((𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓) ∈ (𝑥𝐻𝑧) → (((𝑥(2nd𝐹)𝑧) ↾ (𝑥𝐻𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)) = ((𝑥(2nd𝐹)𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)))
122120, 121syl 17 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((𝑥(2nd𝐹)𝑧) ↾ (𝑥𝐻𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)) = ((𝑥(2nd𝐹)𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)))
123313ad2ant1 1102 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (1st𝐹)(𝐶 Func 𝐷)(2nd𝐹))
124353ad2ant1 1102 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → dom dom 𝐻 ⊆ (Base‘𝐶))
125124, 107sseldd 3637 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑥 ∈ (Base‘𝐶))
126124, 110sseldd 3637 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑦 ∈ (Base‘𝐶))
127124, 112sseldd 3637 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑧 ∈ (Base‘𝐶))
128103, 104, 52, 107, 110subcss2 16550 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑥𝐻𝑦) ⊆ (𝑥(Hom ‘𝐶)𝑦))
129128, 116sseldd 3637 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑓 ∈ (𝑥(Hom ‘𝐶)𝑦))
130103, 104, 52, 110, 112subcss2 16550 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑦𝐻𝑧) ⊆ (𝑦(Hom ‘𝐶)𝑧))
131130, 119sseldd 3637 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝑔 ∈ (𝑦(Hom ‘𝐶)𝑧))
13228, 52, 108, 22, 123, 125, 126, 127, 129, 131funcco 16578 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑥(2nd𝐹)𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)) = (((𝑦(2nd𝐹)𝑧)‘𝑔)(⟨((1st𝐹)‘𝑥), ((1st𝐹)‘𝑦)⟩(comp‘𝐷)((1st𝐹)‘𝑧))((𝑥(2nd𝐹)𝑦)‘𝑓)))
133122, 132eqtrd 2685 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((𝑥(2nd𝐹)𝑧) ↾ (𝑥𝐻𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)) = (((𝑦(2nd𝐹)𝑧)‘𝑔)(⟨((1st𝐹)‘𝑥), ((1st𝐹)‘𝑦)⟩(comp‘𝐷)((1st𝐹)‘𝑧))((𝑥(2nd𝐹)𝑦)‘𝑓)))
13413ad2ant1 1102 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → 𝐹 ∈ (𝐶 Func 𝐷))
135134, 103, 104, 107, 112resf2nd 16602 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑥(2nd ‘(𝐹f 𝐻))𝑧) = ((𝑥(2nd𝐹)𝑧) ↾ (𝑥𝐻𝑧)))
13623, 28, 37, 34, 35, 108rescco 16539 . . . . . . . . . 10 (𝜑 → (comp‘𝐶) = (comp‘(𝐶cat 𝐻)))
1371363ad2ant1 1102 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (comp‘𝐶) = (comp‘(𝐶cat 𝐻)))
138137eqcomd 2657 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (comp‘(𝐶cat 𝐻)) = (comp‘𝐶))
139138oveqd 6707 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (⟨𝑥, 𝑦⟩(comp‘(𝐶cat 𝐻))𝑧) = (⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧))
140139oveqd 6707 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑔(⟨𝑥, 𝑦⟩(comp‘(𝐶cat 𝐻))𝑧)𝑓) = (𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓))
141135, 140fveq12d 6235 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘(𝐶cat 𝐻))𝑧)𝑓)) = (((𝑥(2nd𝐹)𝑧) ↾ (𝑥𝐻𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝐶)𝑧)𝑓)))
142107, 74syl 17 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((1st𝐹) ↾ dom dom 𝐻)‘𝑥) = ((1st𝐹)‘𝑥))
143110, 76syl 17 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((1st𝐹) ↾ dom dom 𝐻)‘𝑦) = ((1st𝐹)‘𝑦))
144142, 143opeq12d 4441 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ⟨(((1st𝐹) ↾ dom dom 𝐻)‘𝑥), (((1st𝐹) ↾ dom dom 𝐻)‘𝑦)⟩ = ⟨((1st𝐹)‘𝑥), ((1st𝐹)‘𝑦)⟩)
145 fvres 6245 . . . . . . . 8 (𝑧 ∈ dom dom 𝐻 → (((1st𝐹) ↾ dom dom 𝐻)‘𝑧) = ((1st𝐹)‘𝑧))
146112, 145syl 17 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((1st𝐹) ↾ dom dom 𝐻)‘𝑧) = ((1st𝐹)‘𝑧))
147144, 146oveq12d 6708 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (⟨(((1st𝐹) ↾ dom dom 𝐻)‘𝑥), (((1st𝐹) ↾ dom dom 𝐻)‘𝑦)⟩(comp‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑧)) = (⟨((1st𝐹)‘𝑥), ((1st𝐹)‘𝑦)⟩(comp‘𝐷)((1st𝐹)‘𝑧)))
148134, 103, 104, 110, 112resf2nd 16602 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑦(2nd ‘(𝐹f 𝐻))𝑧) = ((𝑦(2nd𝐹)𝑧) ↾ (𝑦𝐻𝑧)))
149148fveq1d 6231 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑦(2nd ‘(𝐹f 𝐻))𝑧)‘𝑔) = (((𝑦(2nd𝐹)𝑧) ↾ (𝑦𝐻𝑧))‘𝑔))
150 fvres 6245 . . . . . . . 8 (𝑔 ∈ (𝑦𝐻𝑧) → (((𝑦(2nd𝐹)𝑧) ↾ (𝑦𝐻𝑧))‘𝑔) = ((𝑦(2nd𝐹)𝑧)‘𝑔))
151119, 150syl 17 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((𝑦(2nd𝐹)𝑧) ↾ (𝑦𝐻𝑧))‘𝑔) = ((𝑦(2nd𝐹)𝑧)‘𝑔))
152149, 151eqtrd 2685 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑦(2nd ‘(𝐹f 𝐻))𝑧)‘𝑔) = ((𝑦(2nd𝐹)𝑧)‘𝑔))
153134, 103, 104, 107, 110resf2nd 16602 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (𝑥(2nd ‘(𝐹f 𝐻))𝑦) = ((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦)))
154153fveq1d 6231 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑦)‘𝑓) = (((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦))‘𝑓))
155 fvres 6245 . . . . . . . 8 (𝑓 ∈ (𝑥𝐻𝑦) → (((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦))‘𝑓) = ((𝑥(2nd𝐹)𝑦)‘𝑓))
156116, 155syl 17 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((𝑥(2nd𝐹)𝑦) ↾ (𝑥𝐻𝑦))‘𝑓) = ((𝑥(2nd𝐹)𝑦)‘𝑓))
157154, 156eqtrd 2685 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑦)‘𝑓) = ((𝑥(2nd𝐹)𝑦)‘𝑓))
158147, 152, 157oveq123d 6711 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → (((𝑦(2nd ‘(𝐹f 𝐻))𝑧)‘𝑔)(⟨(((1st𝐹) ↾ dom dom 𝐻)‘𝑥), (((1st𝐹) ↾ dom dom 𝐻)‘𝑦)⟩(comp‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑧))((𝑥(2nd ‘(𝐹f 𝐻))𝑦)‘𝑓)) = (((𝑦(2nd𝐹)𝑧)‘𝑔)(⟨((1st𝐹)‘𝑥), ((1st𝐹)‘𝑦)⟩(comp‘𝐷)((1st𝐹)‘𝑧))((𝑥(2nd𝐹)𝑦)‘𝑓)))
159133, 141, 1583eqtr4d 2695 . . . 4 ((𝜑 ∧ (𝑥 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑦 ∈ (Base‘(𝐶cat 𝐻)) ∧ 𝑧 ∈ (Base‘(𝐶cat 𝐻))) ∧ (𝑓 ∈ (𝑥(Hom ‘(𝐶cat 𝐻))𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘(𝐶cat 𝐻))𝑧))) → ((𝑥(2nd ‘(𝐹f 𝐻))𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘(𝐶cat 𝐻))𝑧)𝑓)) = (((𝑦(2nd ‘(𝐹f 𝐻))𝑧)‘𝑔)(⟨(((1st𝐹) ↾ dom dom 𝐻)‘𝑥), (((1st𝐹) ↾ dom dom 𝐻)‘𝑦)⟩(comp‘𝐷)(((1st𝐹) ↾ dom dom 𝐻)‘𝑧))((𝑥(2nd ‘(𝐹f 𝐻))𝑦)‘𝑓)))
16015, 16, 17, 18, 19, 20, 21, 22, 24, 27, 40, 51, 81, 102, 159isfuncd 16572 . . 3 (𝜑 → ((1st𝐹) ↾ dom dom 𝐻)((𝐶cat 𝐻) Func 𝐷)(2nd ‘(𝐹f 𝐻)))
161 df-br 4686 . . 3 (((1st𝐹) ↾ dom dom 𝐻)((𝐶cat 𝐻) Func 𝐷)(2nd ‘(𝐹f 𝐻)) ↔ ⟨((1st𝐹) ↾ dom dom 𝐻), (2nd ‘(𝐹f 𝐻))⟩ ∈ ((𝐶cat 𝐻) Func 𝐷))
162160, 161sylib 208 . 2 (𝜑 → ⟨((1st𝐹) ↾ dom dom 𝐻), (2nd ‘(𝐹f 𝐻))⟩ ∈ ((𝐶cat 𝐻) Func 𝐷))
16314, 162eqeltrd 2730 1 (𝜑 → (𝐹f 𝐻) ∈ ((𝐶cat 𝐻) Func 𝐷))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 383  w3a 1054   = wceq 1523  wcel 2030  Vcvv 3231  wss 3607  cop 4216   class class class wbr 4685  cmpt 4762   × cxp 5141  dom cdm 5143  cres 5145  Rel wrel 5148   Fn wfn 5921  wf 5922  cfv 5926  (class class class)co 6690  1st c1st 7208  2nd c2nd 7209  Basecbs 15904  Hom chom 15999  compcco 16000  Catccat 16372  Idccid 16373  cat cresc 16515  Subcatcsubc 16516   Func cfunc 16561  f cresf 16564
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-fal 1529  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-er 7787  df-map 7901  df-pm 7902  df-ixp 7951  df-en 7998  df-dom 7999  df-sdom 8000  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-nn 11059  df-2 11117  df-3 11118  df-4 11119  df-5 11120  df-6 11121  df-7 11122  df-8 11123  df-9 11124  df-n0 11331  df-z 11416  df-dec 11532  df-ndx 15907  df-slot 15908  df-base 15910  df-sets 15911  df-ress 15912  df-hom 16013  df-cco 16014  df-cat 16376  df-cid 16377  df-homf 16378  df-ssc 16517  df-resc 16518  df-subc 16519  df-func 16565  df-resf 16568
This theorem is referenced by:  funcrngcsetc  42323  funcringcsetc  42360
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