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Theorem uptx 21711
Description: Universal property of the binary topological product. (Contributed by Jeff Madsen, 2-Sep-2009.) (Proof shortened by Mario Carneiro, 22-Aug-2015.)
Hypotheses
Ref Expression
uptx.1 𝑇 = (𝑅 ×t 𝑆)
uptx.2 𝑋 = 𝑅
uptx.3 𝑌 = 𝑆
uptx.4 𝑍 = (𝑋 × 𝑌)
uptx.5 𝑃 = (1st𝑍)
uptx.6 𝑄 = (2nd𝑍)
Assertion
Ref Expression
uptx ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∃! ∈ (𝑈 Cn 𝑇)(𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))
Distinct variable groups:   ,𝐹   ,𝐺   𝑃,   𝑄,   𝑅,   𝑇,   𝑆,   𝑈,   ,𝑋   ,𝑌
Allowed substitution hint:   𝑍()

Proof of Theorem uptx
Dummy variables 𝑥 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2765 . . . . 5 𝑈 = 𝑈
2 eqid 2765 . . . . 5 (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)
31, 2txcnmpt 21710 . . . 4 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn (𝑅 ×t 𝑆)))
4 uptx.1 . . . . 5 𝑇 = (𝑅 ×t 𝑆)
54oveq2i 6855 . . . 4 (𝑈 Cn 𝑇) = (𝑈 Cn (𝑅 ×t 𝑆))
63, 5syl6eleqr 2855 . . 3 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn 𝑇))
7 uptx.2 . . . . . 6 𝑋 = 𝑅
81, 7cnf 21333 . . . . 5 (𝐹 ∈ (𝑈 Cn 𝑅) → 𝐹: 𝑈𝑋)
9 uptx.3 . . . . . 6 𝑌 = 𝑆
101, 9cnf 21333 . . . . 5 (𝐺 ∈ (𝑈 Cn 𝑆) → 𝐺: 𝑈𝑌)
11 ffn 6225 . . . . . . . 8 (𝐹: 𝑈𝑋𝐹 Fn 𝑈)
1211adantr 472 . . . . . . 7 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → 𝐹 Fn 𝑈)
13 fo1st 7388 . . . . . . . . . . 11 1st :V–onto→V
14 fofn 6302 . . . . . . . . . . 11 (1st :V–onto→V → 1st Fn V)
1513, 14ax-mp 5 . . . . . . . . . 10 1st Fn V
16 ssv 3787 . . . . . . . . . 10 (𝑋 × 𝑌) ⊆ V
17 fnssres 6184 . . . . . . . . . 10 ((1st Fn V ∧ (𝑋 × 𝑌) ⊆ V) → (1st ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌))
1815, 16, 17mp2an 683 . . . . . . . . 9 (1st ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌)
1918a1i 11 . . . . . . . 8 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → (1st ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌))
20 ffvelrn 6549 . . . . . . . . . . . 12 ((𝐹: 𝑈𝑋𝑥 𝑈) → (𝐹𝑥) ∈ 𝑋)
21 ffvelrn 6549 . . . . . . . . . . . 12 ((𝐺: 𝑈𝑌𝑥 𝑈) → (𝐺𝑥) ∈ 𝑌)
22 opelxpi 5316 . . . . . . . . . . . 12 (((𝐹𝑥) ∈ 𝑋 ∧ (𝐺𝑥) ∈ 𝑌) → ⟨(𝐹𝑥), (𝐺𝑥)⟩ ∈ (𝑋 × 𝑌))
2320, 21, 22syl2an 589 . . . . . . . . . . 11 (((𝐹: 𝑈𝑋𝑥 𝑈) ∧ (𝐺: 𝑈𝑌𝑥 𝑈)) → ⟨(𝐹𝑥), (𝐺𝑥)⟩ ∈ (𝑋 × 𝑌))
2423anandirs 669 . . . . . . . . . 10 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑥 𝑈) → ⟨(𝐹𝑥), (𝐺𝑥)⟩ ∈ (𝑋 × 𝑌))
2524fmpttd 6577 . . . . . . . . 9 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩): 𝑈⟶(𝑋 × 𝑌))
26 ffn 6225 . . . . . . . . 9 ((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩): 𝑈⟶(𝑋 × 𝑌) → (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) Fn 𝑈)
2725, 26syl 17 . . . . . . . 8 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) Fn 𝑈)
2825frnd 6232 . . . . . . . 8 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → ran (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ⊆ (𝑋 × 𝑌))
29 fnco 6179 . . . . . . . 8 (((1st ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌) ∧ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) Fn 𝑈 ∧ ran (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ⊆ (𝑋 × 𝑌)) → ((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) Fn 𝑈)
3019, 27, 28, 29syl3anc 1490 . . . . . . 7 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → ((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) Fn 𝑈)
31 fvco3 6466 . . . . . . . . 9 (((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩): 𝑈⟶(𝑋 × 𝑌) ∧ 𝑧 𝑈) → (((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))‘𝑧) = ((1st ↾ (𝑋 × 𝑌))‘((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧)))
3225, 31sylan 575 . . . . . . . 8 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → (((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))‘𝑧) = ((1st ↾ (𝑋 × 𝑌))‘((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧)))
33 fveq2 6377 . . . . . . . . . . . 12 (𝑥 = 𝑧 → (𝐹𝑥) = (𝐹𝑧))
34 fveq2 6377 . . . . . . . . . . . 12 (𝑥 = 𝑧 → (𝐺𝑥) = (𝐺𝑧))
3533, 34opeq12d 4569 . . . . . . . . . . 11 (𝑥 = 𝑧 → ⟨(𝐹𝑥), (𝐺𝑥)⟩ = ⟨(𝐹𝑧), (𝐺𝑧)⟩)
36 opex 5090 . . . . . . . . . . 11 ⟨(𝐹𝑧), (𝐺𝑧)⟩ ∈ V
3735, 2, 36fvmpt 6473 . . . . . . . . . 10 (𝑧 𝑈 → ((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧) = ⟨(𝐹𝑧), (𝐺𝑧)⟩)
3837adantl 473 . . . . . . . . 9 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧) = ⟨(𝐹𝑧), (𝐺𝑧)⟩)
3938fveq2d 6381 . . . . . . . 8 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((1st ↾ (𝑋 × 𝑌))‘((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧)) = ((1st ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩))
40 ffvelrn 6549 . . . . . . . . . . . 12 ((𝐹: 𝑈𝑋𝑧 𝑈) → (𝐹𝑧) ∈ 𝑋)
41 ffvelrn 6549 . . . . . . . . . . . 12 ((𝐺: 𝑈𝑌𝑧 𝑈) → (𝐺𝑧) ∈ 𝑌)
42 opelxpi 5316 . . . . . . . . . . . 12 (((𝐹𝑧) ∈ 𝑋 ∧ (𝐺𝑧) ∈ 𝑌) → ⟨(𝐹𝑧), (𝐺𝑧)⟩ ∈ (𝑋 × 𝑌))
4340, 41, 42syl2an 589 . . . . . . . . . . 11 (((𝐹: 𝑈𝑋𝑧 𝑈) ∧ (𝐺: 𝑈𝑌𝑧 𝑈)) → ⟨(𝐹𝑧), (𝐺𝑧)⟩ ∈ (𝑋 × 𝑌))
4443anandirs 669 . . . . . . . . . 10 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ⟨(𝐹𝑧), (𝐺𝑧)⟩ ∈ (𝑋 × 𝑌))
45 fvres 6396 . . . . . . . . . 10 (⟨(𝐹𝑧), (𝐺𝑧)⟩ ∈ (𝑋 × 𝑌) → ((1st ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (1st ‘⟨(𝐹𝑧), (𝐺𝑧)⟩))
4644, 45syl 17 . . . . . . . . 9 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((1st ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (1st ‘⟨(𝐹𝑧), (𝐺𝑧)⟩))
47 fvex 6390 . . . . . . . . . 10 (𝐹𝑧) ∈ V
48 fvex 6390 . . . . . . . . . 10 (𝐺𝑧) ∈ V
4947, 48op1st 7376 . . . . . . . . 9 (1st ‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (𝐹𝑧)
5046, 49syl6eq 2815 . . . . . . . 8 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((1st ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (𝐹𝑧))
5132, 39, 503eqtrrd 2804 . . . . . . 7 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → (𝐹𝑧) = (((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))‘𝑧))
5212, 30, 51eqfnfvd 6506 . . . . . 6 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → 𝐹 = ((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
53 uptx.5 . . . . . . . 8 𝑃 = (1st𝑍)
54 uptx.4 . . . . . . . . 9 𝑍 = (𝑋 × 𝑌)
5554reseq2i 5564 . . . . . . . 8 (1st𝑍) = (1st ↾ (𝑋 × 𝑌))
5653, 55eqtri 2787 . . . . . . 7 𝑃 = (1st ↾ (𝑋 × 𝑌))
5756coeq1i 5452 . . . . . 6 (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) = ((1st ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))
5852, 57syl6eqr 2817 . . . . 5 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → 𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
598, 10, 58syl2an 589 . . . 4 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → 𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
60 ffn 6225 . . . . . . . 8 (𝐺: 𝑈𝑌𝐺 Fn 𝑈)
6160adantl 473 . . . . . . 7 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → 𝐺 Fn 𝑈)
62 fo2nd 7389 . . . . . . . . . . 11 2nd :V–onto→V
63 fofn 6302 . . . . . . . . . . 11 (2nd :V–onto→V → 2nd Fn V)
6462, 63ax-mp 5 . . . . . . . . . 10 2nd Fn V
65 fnssres 6184 . . . . . . . . . 10 ((2nd Fn V ∧ (𝑋 × 𝑌) ⊆ V) → (2nd ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌))
6664, 16, 65mp2an 683 . . . . . . . . 9 (2nd ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌)
6766a1i 11 . . . . . . . 8 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → (2nd ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌))
68 fnco 6179 . . . . . . . 8 (((2nd ↾ (𝑋 × 𝑌)) Fn (𝑋 × 𝑌) ∧ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) Fn 𝑈 ∧ ran (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ⊆ (𝑋 × 𝑌)) → ((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) Fn 𝑈)
6967, 27, 28, 68syl3anc 1490 . . . . . . 7 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → ((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) Fn 𝑈)
70 fvco3 6466 . . . . . . . . 9 (((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩): 𝑈⟶(𝑋 × 𝑌) ∧ 𝑧 𝑈) → (((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))‘𝑧) = ((2nd ↾ (𝑋 × 𝑌))‘((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧)))
7125, 70sylan 575 . . . . . . . 8 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → (((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))‘𝑧) = ((2nd ↾ (𝑋 × 𝑌))‘((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧)))
7238fveq2d 6381 . . . . . . . 8 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((2nd ↾ (𝑋 × 𝑌))‘((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)‘𝑧)) = ((2nd ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩))
73 fvres 6396 . . . . . . . . . 10 (⟨(𝐹𝑧), (𝐺𝑧)⟩ ∈ (𝑋 × 𝑌) → ((2nd ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (2nd ‘⟨(𝐹𝑧), (𝐺𝑧)⟩))
7444, 73syl 17 . . . . . . . . 9 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((2nd ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (2nd ‘⟨(𝐹𝑧), (𝐺𝑧)⟩))
7547, 48op2nd 7377 . . . . . . . . 9 (2nd ‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (𝐺𝑧)
7674, 75syl6eq 2815 . . . . . . . 8 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → ((2nd ↾ (𝑋 × 𝑌))‘⟨(𝐹𝑧), (𝐺𝑧)⟩) = (𝐺𝑧))
7771, 72, 763eqtrrd 2804 . . . . . . 7 (((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) ∧ 𝑧 𝑈) → (𝐺𝑧) = (((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))‘𝑧))
7861, 69, 77eqfnfvd 6506 . . . . . 6 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → 𝐺 = ((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
79 uptx.6 . . . . . . . 8 𝑄 = (2nd𝑍)
8054reseq2i 5564 . . . . . . . 8 (2nd𝑍) = (2nd ↾ (𝑋 × 𝑌))
8179, 80eqtri 2787 . . . . . . 7 𝑄 = (2nd ↾ (𝑋 × 𝑌))
8281coeq1i 5452 . . . . . 6 (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) = ((2nd ↾ (𝑋 × 𝑌)) ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))
8378, 82syl6eqr 2817 . . . . 5 ((𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
848, 10, 83syl2an 589 . . . 4 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
856, 59, 84jca32 511 . . 3 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) ∧ 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))))
86 eleq1 2832 . . . . 5 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → ( ∈ (𝑈 Cn 𝑇) ↔ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn 𝑇)))
87 coeq2 5451 . . . . . . 7 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → (𝑃) = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
8887eqeq2d 2775 . . . . . 6 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → (𝐹 = (𝑃) ↔ 𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))))
89 coeq2 5451 . . . . . . 7 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → (𝑄) = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))
9089eqeq2d 2775 . . . . . 6 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → (𝐺 = (𝑄) ↔ 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))))
9188, 90anbi12d 624 . . . . 5 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → ((𝐹 = (𝑃) ∧ 𝐺 = (𝑄)) ↔ (𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) ∧ 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))))
9286, 91anbi12d 624 . . . 4 ( = (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) → (( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) ↔ ((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) ∧ 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩))))))
9392spcegv 3447 . . 3 ((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn 𝑇) → (((𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩) ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)) ∧ 𝐺 = (𝑄 ∘ (𝑥 𝑈 ↦ ⟨(𝐹𝑥), (𝐺𝑥)⟩)))) → ∃( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))))
946, 85, 93sylc 65 . 2 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∃( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))))
95 eqid 2765 . . . . . . . 8 𝑇 = 𝑇
961, 95cnf 21333 . . . . . . 7 ( ∈ (𝑈 Cn 𝑇) → : 𝑈 𝑇)
97 cntop2 21328 . . . . . . . . 9 (𝐹 ∈ (𝑈 Cn 𝑅) → 𝑅 ∈ Top)
98 cntop2 21328 . . . . . . . . 9 (𝐺 ∈ (𝑈 Cn 𝑆) → 𝑆 ∈ Top)
997, 9txuni 21678 . . . . . . . . . 10 ((𝑅 ∈ Top ∧ 𝑆 ∈ Top) → (𝑋 × 𝑌) = (𝑅 ×t 𝑆))
1004unieqi 4605 . . . . . . . . . 10 𝑇 = (𝑅 ×t 𝑆)
10199, 100syl6reqr 2818 . . . . . . . . 9 ((𝑅 ∈ Top ∧ 𝑆 ∈ Top) → 𝑇 = (𝑋 × 𝑌))
10297, 98, 101syl2an 589 . . . . . . . 8 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → 𝑇 = (𝑋 × 𝑌))
103102feq3d 6212 . . . . . . 7 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → (: 𝑈 𝑇: 𝑈⟶(𝑋 × 𝑌)))
10496, 103syl5ib 235 . . . . . 6 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ( ∈ (𝑈 Cn 𝑇) → : 𝑈⟶(𝑋 × 𝑌)))
105104anim1d 604 . . . . 5 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → (( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) → (: 𝑈⟶(𝑋 × 𝑌) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))))
106 3anass 1116 . . . . 5 ((: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)) ↔ (: 𝑈⟶(𝑋 × 𝑌) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))))
107105, 106syl6ibr 243 . . . 4 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → (( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) → (: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄))))
108107alrimiv 2022 . . 3 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∀(( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) → (: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄))))
109 cntop1 21327 . . . . . . 7 (𝐹 ∈ (𝑈 Cn 𝑅) → 𝑈 ∈ Top)
110 uniexg 7155 . . . . . . 7 (𝑈 ∈ Top → 𝑈 ∈ V)
111109, 110syl 17 . . . . . 6 (𝐹 ∈ (𝑈 Cn 𝑅) → 𝑈 ∈ V)
112111adantr 472 . . . . 5 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → 𝑈 ∈ V)
1138adantr 472 . . . . 5 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → 𝐹: 𝑈𝑋)
11410adantl 473 . . . . 5 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → 𝐺: 𝑈𝑌)
11556, 81upxp 21709 . . . . 5 (( 𝑈 ∈ V ∧ 𝐹: 𝑈𝑋𝐺: 𝑈𝑌) → ∃!(: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))
116112, 113, 114, 115syl3anc 1490 . . . 4 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∃!(: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))
117 eumo 2592 . . . 4 (∃!(: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)) → ∃*(: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))
118116, 117syl 17 . . 3 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∃*(: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))
119 moim 2640 . . 3 (∀(( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) → (: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) → (∃*(: 𝑈⟶(𝑋 × 𝑌) ∧ 𝐹 = (𝑃) ∧ 𝐺 = (𝑄)) → ∃*( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))))
120108, 118, 119sylc 65 . 2 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∃*( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))))
121 df-reu 3062 . . 3 (∃! ∈ (𝑈 Cn 𝑇)(𝐹 = (𝑃) ∧ 𝐺 = (𝑄)) ↔ ∃!( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))))
122 df-eu 2582 . . 3 (∃!( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) ↔ (∃( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) ∧ ∃*( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))))
123121, 122bitri 266 . 2 (∃! ∈ (𝑈 Cn 𝑇)(𝐹 = (𝑃) ∧ 𝐺 = (𝑄)) ↔ (∃( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄))) ∧ ∃*( ∈ (𝑈 Cn 𝑇) ∧ (𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))))
12494, 120, 123sylanbrc 578 1 ((𝐹 ∈ (𝑈 Cn 𝑅) ∧ 𝐺 ∈ (𝑈 Cn 𝑆)) → ∃! ∈ (𝑈 Cn 𝑇)(𝐹 = (𝑃) ∧ 𝐺 = (𝑄)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384  w3a 1107  wal 1650   = wceq 1652  wex 1874  wcel 2155  ∃*wmo 2563  ∃!weu 2581  ∃!wreu 3057  Vcvv 3350  wss 3734  cop 4342   cuni 4596  cmpt 4890   × cxp 5277  ran crn 5280  cres 5281  ccom 5283   Fn wfn 6065  wf 6066  ontowfo 6068  cfv 6070  (class class class)co 6844  1st c1st 7366  2nd c2nd 7367  Topctop 20980   Cn ccn 21311   ×t ctx 21646
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4932  ax-sep 4943  ax-nul 4951  ax-pow 5003  ax-pr 5064  ax-un 7149
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-ral 3060  df-rex 3061  df-reu 3062  df-rab 3064  df-v 3352  df-sbc 3599  df-csb 3694  df-dif 3737  df-un 3739  df-in 3741  df-ss 3748  df-nul 4082  df-if 4246  df-pw 4319  df-sn 4337  df-pr 4339  df-op 4343  df-uni 4597  df-iun 4680  df-br 4812  df-opab 4874  df-mpt 4891  df-id 5187  df-xp 5285  df-rel 5286  df-cnv 5287  df-co 5288  df-dm 5289  df-rn 5290  df-res 5291  df-ima 5292  df-iota 6033  df-fun 6072  df-fn 6073  df-f 6074  df-f1 6075  df-fo 6076  df-f1o 6077  df-fv 6078  df-ov 6847  df-oprab 6848  df-mpt2 6849  df-1st 7368  df-2nd 7369  df-map 8064  df-topgen 16373  df-top 20981  df-topon 20998  df-bases 21033  df-cn 21314  df-tx 21648
This theorem is referenced by:  txcn  21712
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