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Theorem 1stfcl 16758
Description: The first projection functor is a functor onto the left argument. (Contributed by Mario Carneiro, 11-Jan-2017.)
Hypotheses
Ref Expression
1stfcl.t 𝑇 = (𝐶 ×c 𝐷)
1stfcl.c (𝜑𝐶 ∈ Cat)
1stfcl.d (𝜑𝐷 ∈ Cat)
1stfcl.p 𝑃 = (𝐶 1stF 𝐷)
Assertion
Ref Expression
1stfcl (𝜑𝑃 ∈ (𝑇 Func 𝐶))

Proof of Theorem 1stfcl
Dummy variables 𝑓 𝑔 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 1stfcl.t . . . 4 𝑇 = (𝐶 ×c 𝐷)
2 eqid 2621 . . . . 5 (Base‘𝐶) = (Base‘𝐶)
3 eqid 2621 . . . . 5 (Base‘𝐷) = (Base‘𝐷)
41, 2, 3xpcbas 16739 . . . 4 ((Base‘𝐶) × (Base‘𝐷)) = (Base‘𝑇)
5 eqid 2621 . . . 4 (Hom ‘𝑇) = (Hom ‘𝑇)
6 1stfcl.c . . . 4 (𝜑𝐶 ∈ Cat)
7 1stfcl.d . . . 4 (𝜑𝐷 ∈ Cat)
8 1stfcl.p . . . 4 𝑃 = (𝐶 1stF 𝐷)
91, 4, 5, 6, 7, 81stfval 16752 . . 3 (𝜑𝑃 = ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦)))⟩)
10 fo1st 7133 . . . . . . . 8 1st :V–onto→V
11 fofun 6073 . . . . . . . 8 (1st :V–onto→V → Fun 1st )
1210, 11ax-mp 5 . . . . . . 7 Fun 1st
13 fvex 6158 . . . . . . . 8 (Base‘𝐶) ∈ V
14 fvex 6158 . . . . . . . 8 (Base‘𝐷) ∈ V
1513, 14xpex 6915 . . . . . . 7 ((Base‘𝐶) × (Base‘𝐷)) ∈ V
16 resfunexg 6433 . . . . . . 7 ((Fun 1st ∧ ((Base‘𝐶) × (Base‘𝐷)) ∈ V) → (1st ↾ ((Base‘𝐶) × (Base‘𝐷))) ∈ V)
1712, 15, 16mp2an 707 . . . . . 6 (1st ↾ ((Base‘𝐶) × (Base‘𝐷))) ∈ V
1815, 15mpt2ex 7192 . . . . . 6 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦))) ∈ V
1917, 18op2ndd 7124 . . . . 5 (𝑃 = ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦)))⟩ → (2nd𝑃) = (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦))))
209, 19syl 17 . . . 4 (𝜑 → (2nd𝑃) = (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦))))
2120opeq2d 4377 . . 3 (𝜑 → ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (2nd𝑃)⟩ = ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦)))⟩)
229, 21eqtr4d 2658 . 2 (𝜑𝑃 = ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (2nd𝑃)⟩)
23 eqid 2621 . . . 4 (Hom ‘𝐶) = (Hom ‘𝐶)
24 eqid 2621 . . . 4 (Id‘𝑇) = (Id‘𝑇)
25 eqid 2621 . . . 4 (Id‘𝐶) = (Id‘𝐶)
26 eqid 2621 . . . 4 (comp‘𝑇) = (comp‘𝑇)
27 eqid 2621 . . . 4 (comp‘𝐶) = (comp‘𝐶)
281, 6, 7xpccat 16751 . . . 4 (𝜑𝑇 ∈ Cat)
29 f1stres 7135 . . . . 5 (1st ↾ ((Base‘𝐶) × (Base‘𝐷))):((Base‘𝐶) × (Base‘𝐷))⟶(Base‘𝐶)
3029a1i 11 . . . 4 (𝜑 → (1st ↾ ((Base‘𝐶) × (Base‘𝐷))):((Base‘𝐶) × (Base‘𝐷))⟶(Base‘𝐶))
31 eqid 2621 . . . . . 6 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦))) = (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦)))
32 ovex 6632 . . . . . . 7 (𝑥(Hom ‘𝑇)𝑦) ∈ V
33 resfunexg 6433 . . . . . . 7 ((Fun 1st ∧ (𝑥(Hom ‘𝑇)𝑦) ∈ V) → (1st ↾ (𝑥(Hom ‘𝑇)𝑦)) ∈ V)
3412, 32, 33mp2an 707 . . . . . 6 (1st ↾ (𝑥(Hom ‘𝑇)𝑦)) ∈ V
3531, 34fnmpt2i 7184 . . . . 5 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦))) Fn (((Base‘𝐶) × (Base‘𝐷)) × ((Base‘𝐶) × (Base‘𝐷)))
3620fneq1d 5939 . . . . 5 (𝜑 → ((2nd𝑃) Fn (((Base‘𝐶) × (Base‘𝐷)) × ((Base‘𝐶) × (Base‘𝐷))) ↔ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)), 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ↦ (1st ↾ (𝑥(Hom ‘𝑇)𝑦))) Fn (((Base‘𝐶) × (Base‘𝐷)) × ((Base‘𝐶) × (Base‘𝐷)))))
3735, 36mpbiri 248 . . . 4 (𝜑 → (2nd𝑃) Fn (((Base‘𝐶) × (Base‘𝐷)) × ((Base‘𝐶) × (Base‘𝐷))))
38 f1stres 7135 . . . . . 6 (1st ↾ (((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))):(((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))⟶((1st𝑥)(Hom ‘𝐶)(1st𝑦))
396adantr 481 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → 𝐶 ∈ Cat)
407adantr 481 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → 𝐷 ∈ Cat)
41 simprl 793 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → 𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)))
42 simprr 795 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))
431, 4, 5, 39, 40, 8, 41, 421stf2 16754 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (𝑥(2nd𝑃)𝑦) = (1st ↾ (𝑥(Hom ‘𝑇)𝑦)))
44 eqid 2621 . . . . . . . . . 10 (Hom ‘𝐷) = (Hom ‘𝐷)
451, 4, 23, 44, 5, 41, 42xpchom 16741 . . . . . . . . 9 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (𝑥(Hom ‘𝑇)𝑦) = (((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦))))
4645reseq2d 5356 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (1st ↾ (𝑥(Hom ‘𝑇)𝑦)) = (1st ↾ (((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))))
4743, 46eqtrd 2655 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (𝑥(2nd𝑃)𝑦) = (1st ↾ (((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))))
4847feq1d 5987 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → ((𝑥(2nd𝑃)𝑦):(((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))⟶((1st𝑥)(Hom ‘𝐶)(1st𝑦)) ↔ (1st ↾ (((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))):(((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))⟶((1st𝑥)(Hom ‘𝐶)(1st𝑦))))
4938, 48mpbiri 248 . . . . 5 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (𝑥(2nd𝑃)𝑦):(((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))⟶((1st𝑥)(Hom ‘𝐶)(1st𝑦)))
50 fvres 6164 . . . . . . . 8 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥) = (1st𝑥))
5150ad2antrl 763 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥) = (1st𝑥))
52 fvres 6164 . . . . . . . 8 (𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦) = (1st𝑦))
5352ad2antll 764 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦) = (1st𝑦))
5451, 53oveq12d 6622 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥)(Hom ‘𝐶)((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)) = ((1st𝑥)(Hom ‘𝐶)(1st𝑦)))
5545, 54feq23d 5997 . . . . 5 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → ((𝑥(2nd𝑃)𝑦):(𝑥(Hom ‘𝑇)𝑦)⟶(((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥)(Hom ‘𝐶)((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)) ↔ (𝑥(2nd𝑃)𝑦):(((1st𝑥)(Hom ‘𝐶)(1st𝑦)) × ((2nd𝑥)(Hom ‘𝐷)(2nd𝑦)))⟶((1st𝑥)(Hom ‘𝐶)(1st𝑦))))
5649, 55mpbird 247 . . . 4 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))) → (𝑥(2nd𝑃)𝑦):(𝑥(Hom ‘𝑇)𝑦)⟶(((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥)(Hom ‘𝐶)((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)))
5728adantr 481 . . . . . . . 8 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → 𝑇 ∈ Cat)
58 simpr 477 . . . . . . . 8 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → 𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)))
594, 5, 24, 57, 58catidcl 16264 . . . . . . 7 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((Id‘𝑇)‘𝑥) ∈ (𝑥(Hom ‘𝑇)𝑥))
60 fvres 6164 . . . . . . 7 (((Id‘𝑇)‘𝑥) ∈ (𝑥(Hom ‘𝑇)𝑥) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑥))‘((Id‘𝑇)‘𝑥)) = (1st ‘((Id‘𝑇)‘𝑥)))
6159, 60syl 17 . . . . . 6 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑥))‘((Id‘𝑇)‘𝑥)) = (1st ‘((Id‘𝑇)‘𝑥)))
62 1st2nd2 7150 . . . . . . . . . 10 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) → 𝑥 = ⟨(1st𝑥), (2nd𝑥)⟩)
6362adantl 482 . . . . . . . . 9 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → 𝑥 = ⟨(1st𝑥), (2nd𝑥)⟩)
6463fveq2d 6152 . . . . . . . 8 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((Id‘𝑇)‘𝑥) = ((Id‘𝑇)‘⟨(1st𝑥), (2nd𝑥)⟩))
656adantr 481 . . . . . . . . 9 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → 𝐶 ∈ Cat)
667adantr 481 . . . . . . . . 9 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → 𝐷 ∈ Cat)
67 eqid 2621 . . . . . . . . 9 (Id‘𝐷) = (Id‘𝐷)
68 xp1st 7143 . . . . . . . . . 10 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) → (1st𝑥) ∈ (Base‘𝐶))
6968adantl 482 . . . . . . . . 9 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → (1st𝑥) ∈ (Base‘𝐶))
70 xp2nd 7144 . . . . . . . . . 10 (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) → (2nd𝑥) ∈ (Base‘𝐷))
7170adantl 482 . . . . . . . . 9 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → (2nd𝑥) ∈ (Base‘𝐷))
721, 65, 66, 2, 3, 25, 67, 24, 69, 71xpcid 16750 . . . . . . . 8 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((Id‘𝑇)‘⟨(1st𝑥), (2nd𝑥)⟩) = ⟨((Id‘𝐶)‘(1st𝑥)), ((Id‘𝐷)‘(2nd𝑥))⟩)
7364, 72eqtrd 2655 . . . . . . 7 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((Id‘𝑇)‘𝑥) = ⟨((Id‘𝐶)‘(1st𝑥)), ((Id‘𝐷)‘(2nd𝑥))⟩)
74 fvex 6158 . . . . . . . 8 ((Id‘𝐶)‘(1st𝑥)) ∈ V
75 fvex 6158 . . . . . . . 8 ((Id‘𝐷)‘(2nd𝑥)) ∈ V
7674, 75op1std 7123 . . . . . . 7 (((Id‘𝑇)‘𝑥) = ⟨((Id‘𝐶)‘(1st𝑥)), ((Id‘𝐷)‘(2nd𝑥))⟩ → (1st ‘((Id‘𝑇)‘𝑥)) = ((Id‘𝐶)‘(1st𝑥)))
7773, 76syl 17 . . . . . 6 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → (1st ‘((Id‘𝑇)‘𝑥)) = ((Id‘𝐶)‘(1st𝑥)))
7861, 77eqtrd 2655 . . . . 5 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑥))‘((Id‘𝑇)‘𝑥)) = ((Id‘𝐶)‘(1st𝑥)))
791, 4, 5, 65, 66, 8, 58, 581stf2 16754 . . . . . 6 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → (𝑥(2nd𝑃)𝑥) = (1st ↾ (𝑥(Hom ‘𝑇)𝑥)))
8079fveq1d 6150 . . . . 5 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((𝑥(2nd𝑃)𝑥)‘((Id‘𝑇)‘𝑥)) = ((1st ↾ (𝑥(Hom ‘𝑇)𝑥))‘((Id‘𝑇)‘𝑥)))
8150adantl 482 . . . . . 6 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥) = (1st𝑥))
8281fveq2d 6152 . . . . 5 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((Id‘𝐶)‘((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥)) = ((Id‘𝐶)‘(1st𝑥)))
8378, 80, 823eqtr4d 2665 . . . 4 ((𝜑𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷))) → ((𝑥(2nd𝑃)𝑥)‘((Id‘𝑇)‘𝑥)) = ((Id‘𝐶)‘((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥)))
84283ad2ant1 1080 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝑇 ∈ Cat)
85 simp21 1092 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)))
86 simp22 1093 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)))
87 simp23 1094 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷)))
88 simp3l 1087 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦))
89 simp3r 1088 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))
904, 5, 26, 84, 85, 86, 87, 88, 89catcocl 16267 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓) ∈ (𝑥(Hom ‘𝑇)𝑧))
91 fvres 6164 . . . . . . 7 ((𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓) ∈ (𝑥(Hom ‘𝑇)𝑧) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)) = (1st ‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)))
9290, 91syl 17 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)) = (1st ‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)))
931, 4, 5, 26, 85, 86, 87, 88, 89, 27xpcco1st 16745 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (1st ‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)) = ((1st𝑔)(⟨(1st𝑥), (1st𝑦)⟩(comp‘𝐶)(1st𝑧))(1st𝑓)))
9492, 93eqtrd 2655 . . . . 5 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)) = ((1st𝑔)(⟨(1st𝑥), (1st𝑦)⟩(comp‘𝐶)(1st𝑧))(1st𝑓)))
9563ad2ant1 1080 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝐶 ∈ Cat)
9673ad2ant1 1080 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → 𝐷 ∈ Cat)
971, 4, 5, 95, 96, 8, 85, 871stf2 16754 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (𝑥(2nd𝑃)𝑧) = (1st ↾ (𝑥(Hom ‘𝑇)𝑧)))
9897fveq1d 6150 . . . . 5 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((𝑥(2nd𝑃)𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)) = ((1st ↾ (𝑥(Hom ‘𝑇)𝑧))‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)))
9985, 50syl 17 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥) = (1st𝑥))
10086, 52syl 17 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦) = (1st𝑦))
10199, 100opeq12d 4378 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ⟨((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥), ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)⟩ = ⟨(1st𝑥), (1st𝑦)⟩)
102 fvres 6164 . . . . . . . 8 (𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷)) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑧) = (1st𝑧))
10387, 102syl 17 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑧) = (1st𝑧))
104101, 103oveq12d 6622 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (⟨((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥), ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)⟩(comp‘𝐶)((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑧)) = (⟨(1st𝑥), (1st𝑦)⟩(comp‘𝐶)(1st𝑧)))
1051, 4, 5, 95, 96, 8, 86, 871stf2 16754 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (𝑦(2nd𝑃)𝑧) = (1st ↾ (𝑦(Hom ‘𝑇)𝑧)))
106105fveq1d 6150 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((𝑦(2nd𝑃)𝑧)‘𝑔) = ((1st ↾ (𝑦(Hom ‘𝑇)𝑧))‘𝑔))
107 fvres 6164 . . . . . . . 8 (𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧) → ((1st ↾ (𝑦(Hom ‘𝑇)𝑧))‘𝑔) = (1st𝑔))
10889, 107syl 17 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ (𝑦(Hom ‘𝑇)𝑧))‘𝑔) = (1st𝑔))
109106, 108eqtrd 2655 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((𝑦(2nd𝑃)𝑧)‘𝑔) = (1st𝑔))
1101, 4, 5, 95, 96, 8, 85, 861stf2 16754 . . . . . . . 8 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (𝑥(2nd𝑃)𝑦) = (1st ↾ (𝑥(Hom ‘𝑇)𝑦)))
111110fveq1d 6150 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((𝑥(2nd𝑃)𝑦)‘𝑓) = ((1st ↾ (𝑥(Hom ‘𝑇)𝑦))‘𝑓))
112 fvres 6164 . . . . . . . 8 (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑦))‘𝑓) = (1st𝑓))
11388, 112syl 17 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((1st ↾ (𝑥(Hom ‘𝑇)𝑦))‘𝑓) = (1st𝑓))
114111, 113eqtrd 2655 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((𝑥(2nd𝑃)𝑦)‘𝑓) = (1st𝑓))
115104, 109, 114oveq123d 6625 . . . . 5 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → (((𝑦(2nd𝑃)𝑧)‘𝑔)(⟨((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥), ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)⟩(comp‘𝐶)((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑧))((𝑥(2nd𝑃)𝑦)‘𝑓)) = ((1st𝑔)(⟨(1st𝑥), (1st𝑦)⟩(comp‘𝐶)(1st𝑧))(1st𝑓)))
11694, 98, 1153eqtr4d 2665 . . . 4 ((𝜑 ∧ (𝑥 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑦 ∈ ((Base‘𝐶) × (Base‘𝐷)) ∧ 𝑧 ∈ ((Base‘𝐶) × (Base‘𝐷))) ∧ (𝑓 ∈ (𝑥(Hom ‘𝑇)𝑦) ∧ 𝑔 ∈ (𝑦(Hom ‘𝑇)𝑧))) → ((𝑥(2nd𝑃)𝑧)‘(𝑔(⟨𝑥, 𝑦⟩(comp‘𝑇)𝑧)𝑓)) = (((𝑦(2nd𝑃)𝑧)‘𝑔)(⟨((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑥), ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑦)⟩(comp‘𝐶)((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))‘𝑧))((𝑥(2nd𝑃)𝑦)‘𝑓)))
1174, 2, 5, 23, 24, 25, 26, 27, 28, 6, 30, 37, 56, 83, 116isfuncd 16446 . . 3 (𝜑 → (1st ↾ ((Base‘𝐶) × (Base‘𝐷)))(𝑇 Func 𝐶)(2nd𝑃))
118 df-br 4614 . . 3 ((1st ↾ ((Base‘𝐶) × (Base‘𝐷)))(𝑇 Func 𝐶)(2nd𝑃) ↔ ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (2nd𝑃)⟩ ∈ (𝑇 Func 𝐶))
119117, 118sylib 208 . 2 (𝜑 → ⟨(1st ↾ ((Base‘𝐶) × (Base‘𝐷))), (2nd𝑃)⟩ ∈ (𝑇 Func 𝐶))
12022, 119eqeltrd 2698 1 (𝜑𝑃 ∈ (𝑇 Func 𝐶))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384  w3a 1036   = wceq 1480  wcel 1987  Vcvv 3186  cop 4154   class class class wbr 4613   × cxp 5072  cres 5076  Fun wfun 5841   Fn wfn 5842  wf 5843  ontowfo 5845  cfv 5847  (class class class)co 6604  cmpt2 6606  1st c1st 7111  2nd c2nd 7112  Basecbs 15781  Hom chom 15873  compcco 15874  Catccat 16246  Idccid 16247   Func cfunc 16435   ×c cxpc 16729   1stF c1stf 16730
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902  ax-cnex 9936  ax-resscn 9937  ax-1cn 9938  ax-icn 9939  ax-addcl 9940  ax-addrcl 9941  ax-mulcl 9942  ax-mulrcl 9943  ax-mulcom 9944  ax-addass 9945  ax-mulass 9946  ax-distr 9947  ax-i2m1 9948  ax-1ne0 9949  ax-1rid 9950  ax-rnegex 9951  ax-rrecex 9952  ax-cnre 9953  ax-pre-lttri 9954  ax-pre-lttrn 9955  ax-pre-ltadd 9956  ax-pre-mulgt0 9957
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-fal 1486  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-nel 2894  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-pred 5639  df-ord 5685  df-on 5686  df-lim 5687  df-suc 5688  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-om 7013  df-1st 7113  df-2nd 7114  df-wrecs 7352  df-recs 7413  df-rdg 7451  df-1o 7505  df-oadd 7509  df-er 7687  df-map 7804  df-ixp 7853  df-en 7900  df-dom 7901  df-sdom 7902  df-fin 7903  df-pnf 10020  df-mnf 10021  df-xr 10022  df-ltxr 10023  df-le 10024  df-sub 10212  df-neg 10213  df-nn 10965  df-2 11023  df-3 11024  df-4 11025  df-5 11026  df-6 11027  df-7 11028  df-8 11029  df-9 11030  df-n0 11237  df-z 11322  df-dec 11438  df-uz 11632  df-fz 12269  df-struct 15783  df-ndx 15784  df-slot 15785  df-base 15786  df-hom 15887  df-cco 15888  df-cat 16250  df-cid 16251  df-func 16439  df-xpc 16733  df-1stf 16734
This theorem is referenced by:  prf1st  16765  1st2ndprf  16767  uncfcl  16796  uncf1  16797  uncf2  16798  diagcl  16802  diag11  16804  diag12  16805  diag2  16806  yonedalem1  16833  yonedalem21  16834  yonedalem22  16839
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