Theorem oppfdiag 50342

Description: A diagonal functor for opposite categories is the opposite functor of the diagonal functor for original categories post-composed by an isomorphism (fucoppc 50336). (Contributed by Zhi Wang, 19-Nov-2025.)

Hypotheses

Ref	Expression
oppfdiag.o	⊢ 𝑂 = (oppCat‘𝐶)
oppfdiag.p	⊢ 𝑃 = (oppCat‘𝐷)
oppfdiag.l	⊢ 𝐿 = (𝐶Δfunc𝐷)
oppfdiag.c	⊢ (𝜑 → 𝐶 ∈ Cat)
oppfdiag.d	⊢ (𝜑 → 𝐷 ∈ Cat)
oppfdiag.f	⊢ (𝜑 → 𝐹 = ( oppFunc ↾ (𝐷 Func 𝐶)))
oppfdiag.n	⊢ 𝑁 = (𝐷 Nat 𝐶)
oppfdiag.g	⊢ (𝜑 → 𝐺 = (𝑚 ∈ (𝐷 Func 𝐶), 𝑛 ∈ (𝐷 Func 𝐶) ↦ ( I ↾ (𝑛𝑁𝑚))))

Assertion

Ref	Expression
oppfdiag	⊢ (𝜑 → (⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)) = (𝑂Δfunc𝑃))

Distinct variable groups:   𝐶,𝑚,𝑛   𝐷,𝑚,𝑛   𝑚,𝐿,𝑛   𝑚,𝑁,𝑛   𝜑,𝑚,𝑛

Allowed substitution hints:   𝑃(𝑚, 𝑛)   𝐹(𝑚, 𝑛)   𝐺(𝑚, 𝑛)   𝑂(𝑚, 𝑛)

Proof of Theorem oppfdiag

Dummy variables 𝑓 𝑦 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oppfdiag.o	. . . . . . 7 ⊢ 𝑂 = (oppCat‘𝐶)
2		eqid 2760	. . . . . . 7 ⊢ (Base‘𝐶) = (Base‘𝐶)
3	1, 2	oppcbas 17806	. . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝑂)
4		eqid 2760	. . . . . . 7 ⊢ (𝑃 FuncCat 𝑂) = (𝑃 FuncCat 𝑂)
5	4	fucbas 18052	. . . . . 6 ⊢ (𝑃 Func 𝑂) = (Base‘(𝑃 FuncCat 𝑂))
6		eqid 2760	. . . . . . . . 9 ⊢ (oppCat‘(𝐷 FuncCat 𝐶)) = (oppCat‘(𝐷 FuncCat 𝐶))
7		oppfdiag.l	. . . . . . . . . 10 ⊢ 𝐿 = (𝐶Δfunc𝐷)
8		oppfdiag.c	. . . . . . . . . 10 ⊢ (𝜑 → 𝐶 ∈ Cat)
9		oppfdiag.d	. . . . . . . . . 10 ⊢ (𝜑 → 𝐷 ∈ Cat)
10		eqid 2760	. . . . . . . . . 10 ⊢ (𝐷 FuncCat 𝐶) = (𝐷 FuncCat 𝐶)
11	7, 8, 9, 10	diagcl 18329	. . . . . . . . 9 ⊢ (𝜑 → 𝐿 ∈ (𝐶 Func (𝐷 FuncCat 𝐶)))
12	1, 6, 11	oppfoppc2 50068	. . . . . . . 8 ⊢ (𝜑 → ( oppFunc ‘𝐿) ∈ (𝑂 Func (oppCat‘(𝐷 FuncCat 𝐶))))
13		oppfdiag.p	. . . . . . . . . 10 ⊢ 𝑃 = (oppCat‘𝐷)
14		oppfdiag.n	. . . . . . . . . 10 ⊢ 𝑁 = (𝐷 Nat 𝐶)
15		oppfdiag.f	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹 = ( oppFunc ↾ (𝐷 Func 𝐶)))
16		oppfdiag.g	. . . . . . . . . 10 ⊢ (𝜑 → 𝐺 = (𝑚 ∈ (𝐷 Func 𝐶), 𝑛 ∈ (𝐷 Func 𝐶) ↦ ( I ↾ (𝑛𝑁𝑚))))
17	13, 1, 10, 6, 4, 14, 15, 16, 9, 8	fucoppcfunc 50338	. . . . . . . . 9 ⊢ (𝜑 → 𝐹((oppCat‘(𝐷 FuncCat 𝐶)) Func (𝑃 FuncCat 𝑂))𝐺)
18		df-br 5104	. . . . . . . . 9 ⊢ (𝐹((oppCat‘(𝐷 FuncCat 𝐶)) Func (𝑃 FuncCat 𝑂))𝐺 ↔ ⟨𝐹, 𝐺⟩ ∈ ((oppCat‘(𝐷 FuncCat 𝐶)) Func (𝑃 FuncCat 𝑂)))
19	17, 18	sylib 221	. . . . . . . 8 ⊢ (𝜑 → ⟨𝐹, 𝐺⟩ ∈ ((oppCat‘(𝐷 FuncCat 𝐶)) Func (𝑃 FuncCat 𝑂)))
20	12, 19	cofucl 17977	. . . . . . 7 ⊢ (𝜑 → (⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)) ∈ (𝑂 Func (𝑃 FuncCat 𝑂)))
21	20	func1st2nd 50002	. . . . . 6 ⊢ (𝜑 → (1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))(𝑂 Func (𝑃 FuncCat 𝑂))(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))))
22	3, 5, 21	funcf1 17955	. . . . 5 ⊢ (𝜑 → (1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))):(Base‘𝐶)⟶(𝑃 Func 𝑂))
23	22	ffnd 6703	. . . 4 ⊢ (𝜑 → (1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))) Fn (Base‘𝐶))
24		eqid 2760	. . . . . . . 8 ⊢ (𝑂Δfunc𝑃) = (𝑂Δfunc𝑃)
25	1	oppccat 17810	. . . . . . . . 9 ⊢ (𝐶 ∈ Cat → 𝑂 ∈ Cat)
26	8, 25	syl 18	. . . . . . . 8 ⊢ (𝜑 → 𝑂 ∈ Cat)
27	13	oppccat 17810	. . . . . . . . 9 ⊢ (𝐷 ∈ Cat → 𝑃 ∈ Cat)
28	9, 27	syl 18	. . . . . . . 8 ⊢ (𝜑 → 𝑃 ∈ Cat)
29	24, 26, 28, 4	diagcl 18329	. . . . . . 7 ⊢ (𝜑 → (𝑂Δfunc𝑃) ∈ (𝑂 Func (𝑃 FuncCat 𝑂)))
30	29	func1st2nd 50002	. . . . . 6 ⊢ (𝜑 → (1st ‘(𝑂Δfunc𝑃))(𝑂 Func (𝑃 FuncCat 𝑂))(2nd ‘(𝑂Δfunc𝑃)))
31	3, 5, 30	funcf1 17955	. . . . 5 ⊢ (𝜑 → (1st ‘(𝑂Δfunc𝑃)):(Base‘𝐶)⟶(𝑃 Func 𝑂))
32	31	ffnd 6703	. . . 4 ⊢ (𝜑 → (1st ‘(𝑂Δfunc𝑃)) Fn (Base‘𝐶))
33	12	adantr 486	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → ( oppFunc ‘𝐿) ∈ (𝑂 Func (oppCat‘(𝐷 FuncCat 𝐶))))
34	19	adantr 486	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → ⟨𝐹, 𝐺⟩ ∈ ((oppCat‘(𝐷 FuncCat 𝐶)) Func (𝑃 FuncCat 𝑂)))
35		simpr 490	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → 𝑥 ∈ (Base‘𝐶))
36	3, 33, 34, 35	cofu1 17973	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → ((1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))‘𝑥) = ((1st ‘⟨𝐹, 𝐺⟩)‘((1st ‘( oppFunc ‘𝐿))‘𝑥)))
37	17	func1st 50003	. . . . . . 7 ⊢ (𝜑 → (1st ‘⟨𝐹, 𝐺⟩) = 𝐹)
38	11	oppf1 50065	. . . . . . . 8 ⊢ (𝜑 → (1st ‘( oppFunc ‘𝐿)) = (1st ‘𝐿))
39	38	fveq1d 6880	. . . . . . 7 ⊢ (𝜑 → ((1st ‘( oppFunc ‘𝐿))‘𝑥) = ((1st ‘𝐿)‘𝑥))
40	37, 39	fveq12d 6885	. . . . . 6 ⊢ (𝜑 → ((1st ‘⟨𝐹, 𝐺⟩)‘((1st ‘( oppFunc ‘𝐿))‘𝑥)) = (𝐹‘((1st ‘𝐿)‘𝑥)))
41	40	adantr 486	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → ((1st ‘⟨𝐹, 𝐺⟩)‘((1st ‘( oppFunc ‘𝐿))‘𝑥)) = (𝐹‘((1st ‘𝐿)‘𝑥)))
42	8	adantr 486	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → 𝐶 ∈ Cat)
43	9	adantr 486	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → 𝐷 ∈ Cat)
44	15	adantr 486	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → 𝐹 = ( oppFunc ↾ (𝐷 Func 𝐶)))
45	1, 13, 7, 42, 43, 44, 2, 35	oppfdiag1 50340	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → (𝐹‘((1st ‘𝐿)‘𝑥)) = ((1st ‘(𝑂Δfunc𝑃))‘𝑥))
46	36, 41, 45	3eqtrd 2799	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (Base‘𝐶)) → ((1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))‘𝑥) = ((1st ‘(𝑂Δfunc𝑃))‘𝑥))
47	23, 32, 46	eqfnfvd 7025	. . 3 ⊢ (𝜑 → (1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))) = (1st ‘(𝑂Δfunc𝑃)))
48	3, 21	funcfn2 17958	. . . 4 ⊢ (𝜑 → (2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))) Fn ((Base‘𝐶) × (Base‘𝐶)))
49	3, 30	funcfn2 17958	. . . 4 ⊢ (𝜑 → (2nd ‘(𝑂Δfunc𝑃)) Fn ((Base‘𝐶) × (Base‘𝐶)))
50		eqid 2760	. . . . . . . . 9 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
51	50, 1	oppchom 17803	. . . . . . . 8 ⊢ (𝑥(Hom ‘𝑂)𝑦) = (𝑦(Hom ‘𝐶)𝑥)
52	51	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(Hom ‘𝑂)𝑦) = (𝑦(Hom ‘𝐶)𝑥))
53		eqid 2760	. . . . . . . 8 ⊢ (Hom ‘𝑂) = (Hom ‘𝑂)
54		eqid 2760	. . . . . . . . 9 ⊢ (𝑃 Nat 𝑂) = (𝑃 Nat 𝑂)
55	4, 54	fuchom 18053	. . . . . . . 8 ⊢ (𝑃 Nat 𝑂) = (Hom ‘(𝑃 FuncCat 𝑂))
56	21	adantr 486	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))(𝑂 Func (𝑃 FuncCat 𝑂))(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))))
57		simprl 783	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑥 ∈ (Base‘𝐶))
58		simprr 785	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑦 ∈ (Base‘𝐶))
59	3, 53, 55, 56, 57, 58	funcf2 17957	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦):(𝑥(Hom ‘𝑂)𝑦)⟶(((1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))‘𝑥)(𝑃 Nat 𝑂)((1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))‘𝑦)))
60	52, 59	feq2dd 6688	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦):(𝑦(Hom ‘𝐶)𝑥)⟶(((1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))‘𝑥)(𝑃 Nat 𝑂)((1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))‘𝑦)))
61	60	ffnd 6703	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦) Fn (𝑦(Hom ‘𝐶)𝑥))
62	30	adantr 486	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (1st ‘(𝑂Δfunc𝑃))(𝑂 Func (𝑃 FuncCat 𝑂))(2nd ‘(𝑂Δfunc𝑃)))
63	3, 53, 55, 62, 57, 58	funcf2 17957	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(𝑂Δfunc𝑃))𝑦):(𝑥(Hom ‘𝑂)𝑦)⟶(((1st ‘(𝑂Δfunc𝑃))‘𝑥)(𝑃 Nat 𝑂)((1st ‘(𝑂Δfunc𝑃))‘𝑦)))
64	52, 63	feq2dd 6688	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(𝑂Δfunc𝑃))𝑦):(𝑦(Hom ‘𝐶)𝑥)⟶(((1st ‘(𝑂Δfunc𝑃))‘𝑥)(𝑃 Nat 𝑂)((1st ‘(𝑂Δfunc𝑃))‘𝑦)))
65	64	ffnd 6703	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(𝑂Δfunc𝑃))𝑦) Fn (𝑦(Hom ‘𝐶)𝑥))
66	12	ad2antrr 739	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ( oppFunc ‘𝐿) ∈ (𝑂 Func (oppCat‘(𝐷 FuncCat 𝐶))))
67	19	ad2antrr 739	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ⟨𝐹, 𝐺⟩ ∈ ((oppCat‘(𝐷 FuncCat 𝐶)) Func (𝑃 FuncCat 𝑂)))
68	57	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝑥 ∈ (Base‘𝐶))
69	58	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝑦 ∈ (Base‘𝐶))
70		simpr 490	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥))
71	70, 51	eleqtrrdi 2871	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝑓 ∈ (𝑥(Hom ‘𝑂)𝑦))
72	3, 66, 67, 68, 69, 53, 71	cofu2 17975	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦)‘𝑓) = ((((1st ‘( oppFunc ‘𝐿))‘𝑥)(2nd ‘⟨𝐹, 𝐺⟩)((1st ‘( oppFunc ‘𝐿))‘𝑦))‘((𝑥(2nd ‘( oppFunc ‘𝐿))𝑦)‘𝑓)))
73	17	func2nd 50004	. . . . . . . . . 10 ⊢ (𝜑 → (2nd ‘⟨𝐹, 𝐺⟩) = 𝐺)
74	38	fveq1d 6880	. . . . . . . . . 10 ⊢ (𝜑 → ((1st ‘( oppFunc ‘𝐿))‘𝑦) = ((1st ‘𝐿)‘𝑦))
75	73, 39, 74	oveq123d 7434	. . . . . . . . 9 ⊢ (𝜑 → (((1st ‘( oppFunc ‘𝐿))‘𝑥)(2nd ‘⟨𝐹, 𝐺⟩)((1st ‘( oppFunc ‘𝐿))‘𝑦)) = (((1st ‘𝐿)‘𝑥)𝐺((1st ‘𝐿)‘𝑦)))
76	11	oppf2 50066	. . . . . . . . . 10 ⊢ (𝜑 → (𝑥(2nd ‘( oppFunc ‘𝐿))𝑦) = (𝑦(2nd ‘𝐿)𝑥))
77	76	fveq1d 6880	. . . . . . . . 9 ⊢ (𝜑 → ((𝑥(2nd ‘( oppFunc ‘𝐿))𝑦)‘𝑓) = ((𝑦(2nd ‘𝐿)𝑥)‘𝑓))
78	75, 77	fveq12d 6885	. . . . . . . 8 ⊢ (𝜑 → ((((1st ‘( oppFunc ‘𝐿))‘𝑥)(2nd ‘⟨𝐹, 𝐺⟩)((1st ‘( oppFunc ‘𝐿))‘𝑦))‘((𝑥(2nd ‘( oppFunc ‘𝐿))𝑦)‘𝑓)) = ((((1st ‘𝐿)‘𝑥)𝐺((1st ‘𝐿)‘𝑦))‘((𝑦(2nd ‘𝐿)𝑥)‘𝑓)))
79	78	ad2antrr 739	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((((1st ‘( oppFunc ‘𝐿))‘𝑥)(2nd ‘⟨𝐹, 𝐺⟩)((1st ‘( oppFunc ‘𝐿))‘𝑦))‘((𝑥(2nd ‘( oppFunc ‘𝐿))𝑦)‘𝑓)) = ((((1st ‘𝐿)‘𝑥)𝐺((1st ‘𝐿)‘𝑦))‘((𝑦(2nd ‘𝐿)𝑥)‘𝑓)))
80	16	ad2antrr 739	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝐺 = (𝑚 ∈ (𝐷 Func 𝐶), 𝑛 ∈ (𝐷 Func 𝐶) ↦ ( I ↾ (𝑛𝑁𝑚))))
81	8	ad2antrr 739	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝐶 ∈ Cat)
82	9	ad2antrr 739	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝐷 ∈ Cat)
83		eqid 2760	. . . . . . . . 9 ⊢ ((1st ‘𝐿)‘𝑥) = ((1st ‘𝐿)‘𝑥)
84	7, 81, 82, 2, 68, 83	diag1cl 18330	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((1st ‘𝐿)‘𝑥) ∈ (𝐷 Func 𝐶))
85		eqid 2760	. . . . . . . . 9 ⊢ ((1st ‘𝐿)‘𝑦) = ((1st ‘𝐿)‘𝑦)
86	7, 81, 82, 2, 69, 85	diag1cl 18330	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((1st ‘𝐿)‘𝑦) ∈ (𝐷 Func 𝐶))
87		eqid 2760	. . . . . . . . 9 ⊢ (Base‘𝐷) = (Base‘𝐷)
88	7, 2, 87, 50, 81, 82, 69, 68, 70	diag2 18333	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((𝑦(2nd ‘𝐿)𝑥)‘𝑓) = ((Base‘𝐷) × {𝑓}))
89	7, 2, 87, 50, 81, 82, 69, 68, 70, 14	diag2cl 18334	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((Base‘𝐷) × {𝑓}) ∈ (((1st ‘𝐿)‘𝑦)𝑁((1st ‘𝐿)‘𝑥)))
90	80, 84, 86, 88, 89	opf2 50332	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((((1st ‘𝐿)‘𝑥)𝐺((1st ‘𝐿)‘𝑦))‘((𝑦(2nd ‘𝐿)𝑥)‘𝑓)) = ((Base‘𝐷) × {𝑓}))
91	72, 79, 90	3eqtrd 2799	. . . . . 6 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦)‘𝑓) = ((Base‘𝐷) × {𝑓}))
92	13, 87	oppcbas 17806	. . . . . . 7 ⊢ (Base‘𝐷) = (Base‘𝑃)
93	81, 25	syl 18	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝑂 ∈ Cat)
94	82, 27	syl 18	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → 𝑃 ∈ Cat)
95	24, 3, 92, 53, 93, 94, 68, 69, 71	diag2 18333	. . . . . 6 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((𝑥(2nd ‘(𝑂Δfunc𝑃))𝑦)‘𝑓) = ((Base‘𝐷) × {𝑓}))
96	91, 95	eqtr4d 2798	. . . . 5 ⊢ (((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) ∧ 𝑓 ∈ (𝑦(Hom ‘𝐶)𝑥)) → ((𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦)‘𝑓) = ((𝑥(2nd ‘(𝑂Δfunc𝑃))𝑦)‘𝑓))
97	61, 65, 96	eqfnfvd 7025	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥(2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))𝑦) = (𝑥(2nd ‘(𝑂Δfunc𝑃))𝑦))
98	48, 49, 97	eqfnovd 49794	. . 3 ⊢ (𝜑 → (2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))) = (2nd ‘(𝑂Δfunc𝑃)))
99	47, 98	opeq12d 4841	. 2 ⊢ (𝜑 → ⟨(1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))), (2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))⟩ = ⟨(1st ‘(𝑂Δfunc𝑃)), (2nd ‘(𝑂Δfunc𝑃))⟩)
100		relfunc 17951	. . 3 ⊢ Rel (𝑂 Func (𝑃 FuncCat 𝑂))
101		1st2nd 8036	. . 3 ⊢ ((Rel (𝑂 Func (𝑃 FuncCat 𝑂)) ∧ (⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)) ∈ (𝑂 Func (𝑃 FuncCat 𝑂))) → (⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)) = ⟨(1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))), (2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))⟩)
102	100, 20, 101	sylancr 599	. 2 ⊢ (𝜑 → (⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)) = ⟨(1st ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿))), (2nd ‘(⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)))⟩)
103		1st2nd 8036	. . 3 ⊢ ((Rel (𝑂 Func (𝑃 FuncCat 𝑂)) ∧ (𝑂Δfunc𝑃) ∈ (𝑂 Func (𝑃 FuncCat 𝑂))) → (𝑂Δfunc𝑃) = ⟨(1st ‘(𝑂Δfunc𝑃)), (2nd ‘(𝑂Δfunc𝑃))⟩)
104	100, 29, 103	sylancr 599	. 2 ⊢ (𝜑 → (𝑂Δfunc𝑃) = ⟨(1st ‘(𝑂Δfunc𝑃)), (2nd ‘(𝑂Δfunc𝑃))⟩)
105	99, 102, 104	3eqtr4d 2805	1 ⊢ (𝜑 → (⟨𝐹, 𝐺⟩ ∘func ( oppFunc ‘𝐿)) = (𝑂Δfunc𝑃))

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2145  {csn 4584  ⟨cop 4590   class class class wbr 5103   I cid 5549   × cxp 5653   ↾ cres 5657  Rel wrel 5660  ‘cfv 6533  (class class class)co 7413   ∈ cmpo 7415  1^st c1st 7984  2^nd c2nd 7985  Basecbs 17301  Hom chom 17353  Catccat 17752  oppCatcoppc 17799   Func cfunc 17943   ∘_func ccofu 17945   Nat cnat 18033   FuncCat cfuc 18034  Δ_funccdiag 18300   oppFunc coppf 50048

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 2213  ax-ext 2732  ax-rep 5232  ax-sep 5251  ax-nul 5263  ax-pow 5330  ax-pr 5398  ax-un 7736  ax-cnex 11180  ax-resscn 11181  ax-1cn 11182  ax-icn 11183  ax-addcl 11184  ax-addrcl 11185  ax-mulcl 11186  ax-mulrcl 11187  ax-mulcom 11188  ax-addass 11189  ax-mulass 11190  ax-distr 11191  ax-i2m1 11192  ax-1ne0 11193  ax-1rid 11194  ax-rnegex 11195  ax-rrecex 11196  ax-cnre 11197  ax-pre-lttri 11198  ax-pre-lttrn 11199  ax-pre-ltadd 11200  ax-pre-mulgt0 11201

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-nel 3062  df-ral 3077  df-rex 3087  df-rmo 3365  df-reu 3366  df-rab 3413  df-v 3452  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-pss 3919  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-tp 4589  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-tr 5213  df-id 5550  df-eprel 5555  df-po 5563  df-so 5564  df-fr 5608  df-we 5610  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-pred 6299  df-ord 6360  df-on 6361  df-lim 6362  df-suc 6363  df-iota 6489  df-fun 6535  df-fn 6536  df-f 6537  df-f1 6538  df-fo 6539  df-f1o 6540  df-fv 6541  df-riota 7370  df-ov 7416  df-oprab 7417  df-mpo 7418  df-om 7863  df-1st 7986  df-2nd 7987  df-tpos 8224  df-frecs 8280  df-wrecs 8311  df-recs 8360  df-rdg 8399  df-1o 8455  df-er 8696  df-map 8828  df-ixp 8905  df-en 8953  df-dom 8954  df-sdom 8955  df-fin 8956  df-pnf 11269  df-mnf 11270  df-xr 11271  df-ltxr 11272  df-le 11273  df-sub 11467  df-neg 11468  df-nn 12258  df-2 12327  df-3 12328  df-4 12329  df-5 12330  df-6 12331  df-7 12332  df-8 12333  df-9 12334  df-n0 12529  df-z 12616  df-dec 12737  df-uz 12888  df-fz 13562  df-struct 17239  df-sets 17256  df-slot 17274  df-ndx 17286  df-base 17302  df-hom 17366  df-cco 17367  df-cat 17756  df-cid 17757  df-homf 17758  df-comf 17759  df-oppc 17800  df-sect 17836  df-inv 17837  df-iso 17838  df-func 17947  df-idfu 17948  df-cofu 17949  df-full 17995  df-fth 17996  df-nat 18035  df-fuc 18036  df-catc 18188  df-xpc 18260  df-1stf 18261  df-curf 18302  df-diag 18304  df-oppf 50049

This theorem is used by:  lmddu  50593