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Theorem ptuncnv 22412
Description: Exhibit the converse function of the map 𝐺 which joins two product topologies on disjoint index sets. (Contributed by Mario Carneiro, 8-Feb-2015.) (Proof shortened by Mario Carneiro, 23-Aug-2015.)
Hypotheses
Ref Expression
ptunhmeo.x 𝑋 = 𝐾
ptunhmeo.y 𝑌 = 𝐿
ptunhmeo.j 𝐽 = (∏t𝐹)
ptunhmeo.k 𝐾 = (∏t‘(𝐹𝐴))
ptunhmeo.l 𝐿 = (∏t‘(𝐹𝐵))
ptunhmeo.g 𝐺 = (𝑥𝑋, 𝑦𝑌 ↦ (𝑥𝑦))
ptunhmeo.c (𝜑𝐶𝑉)
ptunhmeo.f (𝜑𝐹:𝐶⟶Top)
ptunhmeo.u (𝜑𝐶 = (𝐴𝐵))
ptunhmeo.i (𝜑 → (𝐴𝐵) = ∅)
Assertion
Ref Expression
ptuncnv (𝜑𝐺 = (𝑧 𝐽 ↦ ⟨(𝑧𝐴), (𝑧𝐵)⟩))
Distinct variable groups:   𝑥,𝑦,𝑧,𝐴   𝑥,𝐵,𝑦,𝑧   𝑧,𝐺   𝜑,𝑥,𝑦,𝑧   𝑥,𝐶,𝑦,𝑧   𝑥,𝐹,𝑦,𝑧   𝑥,𝐽,𝑦,𝑧   𝑥,𝐾,𝑦,𝑧   𝑥,𝐿,𝑦,𝑧   𝑧,𝑉   𝑥,𝑋,𝑦,𝑧   𝑥,𝑌,𝑦,𝑧
Allowed substitution hints:   𝐺(𝑥,𝑦)   𝑉(𝑥,𝑦)

Proof of Theorem ptuncnv
Dummy variables 𝑘 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ptunhmeo.g . . . 4 𝐺 = (𝑥𝑋, 𝑦𝑌 ↦ (𝑥𝑦))
2 vex 3444 . . . . . . 7 𝑥 ∈ V
3 vex 3444 . . . . . . 7 𝑦 ∈ V
42, 3op1std 7681 . . . . . 6 (𝑤 = ⟨𝑥, 𝑦⟩ → (1st𝑤) = 𝑥)
52, 3op2ndd 7682 . . . . . 6 (𝑤 = ⟨𝑥, 𝑦⟩ → (2nd𝑤) = 𝑦)
64, 5uneq12d 4091 . . . . 5 (𝑤 = ⟨𝑥, 𝑦⟩ → ((1st𝑤) ∪ (2nd𝑤)) = (𝑥𝑦))
76mpompt 7245 . . . 4 (𝑤 ∈ (𝑋 × 𝑌) ↦ ((1st𝑤) ∪ (2nd𝑤))) = (𝑥𝑋, 𝑦𝑌 ↦ (𝑥𝑦))
81, 7eqtr4i 2824 . . 3 𝐺 = (𝑤 ∈ (𝑋 × 𝑌) ↦ ((1st𝑤) ∪ (2nd𝑤)))
9 xp1st 7703 . . . . . . 7 (𝑤 ∈ (𝑋 × 𝑌) → (1st𝑤) ∈ 𝑋)
109adantl 485 . . . . . 6 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (1st𝑤) ∈ 𝑋)
11 ixpeq2 8458 . . . . . . . . . 10 (∀𝑘𝐴 ((𝐹𝐴)‘𝑘) = (𝐹𝑘) → X𝑘𝐴 ((𝐹𝐴)‘𝑘) = X𝑘𝐴 (𝐹𝑘))
12 fvres 6664 . . . . . . . . . . 11 (𝑘𝐴 → ((𝐹𝐴)‘𝑘) = (𝐹𝑘))
1312unieqd 4814 . . . . . . . . . 10 (𝑘𝐴 ((𝐹𝐴)‘𝑘) = (𝐹𝑘))
1411, 13mprg 3120 . . . . . . . . 9 X𝑘𝐴 ((𝐹𝐴)‘𝑘) = X𝑘𝐴 (𝐹𝑘)
15 ptunhmeo.c . . . . . . . . . . 11 (𝜑𝐶𝑉)
16 ssun1 4099 . . . . . . . . . . . 12 𝐴 ⊆ (𝐴𝐵)
17 ptunhmeo.u . . . . . . . . . . . 12 (𝜑𝐶 = (𝐴𝐵))
1816, 17sseqtrrid 3968 . . . . . . . . . . 11 (𝜑𝐴𝐶)
1915, 18ssexd 5192 . . . . . . . . . 10 (𝜑𝐴 ∈ V)
20 ptunhmeo.f . . . . . . . . . . 11 (𝜑𝐹:𝐶⟶Top)
2120, 18fssresd 6519 . . . . . . . . . 10 (𝜑 → (𝐹𝐴):𝐴⟶Top)
22 ptunhmeo.k . . . . . . . . . . 11 𝐾 = (∏t‘(𝐹𝐴))
2322ptuni 22199 . . . . . . . . . 10 ((𝐴 ∈ V ∧ (𝐹𝐴):𝐴⟶Top) → X𝑘𝐴 ((𝐹𝐴)‘𝑘) = 𝐾)
2419, 21, 23syl2anc 587 . . . . . . . . 9 (𝜑X𝑘𝐴 ((𝐹𝐴)‘𝑘) = 𝐾)
2514, 24syl5eqr 2847 . . . . . . . 8 (𝜑X𝑘𝐴 (𝐹𝑘) = 𝐾)
26 ptunhmeo.x . . . . . . . 8 𝑋 = 𝐾
2725, 26eqtr4di 2851 . . . . . . 7 (𝜑X𝑘𝐴 (𝐹𝑘) = 𝑋)
2827adantr 484 . . . . . 6 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → X𝑘𝐴 (𝐹𝑘) = 𝑋)
2910, 28eleqtrrd 2893 . . . . 5 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (1st𝑤) ∈ X𝑘𝐴 (𝐹𝑘))
30 xp2nd 7704 . . . . . . 7 (𝑤 ∈ (𝑋 × 𝑌) → (2nd𝑤) ∈ 𝑌)
3130adantl 485 . . . . . 6 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (2nd𝑤) ∈ 𝑌)
3217eqcomd 2804 . . . . . . . . . 10 (𝜑 → (𝐴𝐵) = 𝐶)
33 ptunhmeo.i . . . . . . . . . . 11 (𝜑 → (𝐴𝐵) = ∅)
34 uneqdifeq 4396 . . . . . . . . . . 11 ((𝐴𝐶 ∧ (𝐴𝐵) = ∅) → ((𝐴𝐵) = 𝐶 ↔ (𝐶𝐴) = 𝐵))
3518, 33, 34syl2anc 587 . . . . . . . . . 10 (𝜑 → ((𝐴𝐵) = 𝐶 ↔ (𝐶𝐴) = 𝐵))
3632, 35mpbid 235 . . . . . . . . 9 (𝜑 → (𝐶𝐴) = 𝐵)
3736ixpeq1d 8456 . . . . . . . 8 (𝜑X𝑘 ∈ (𝐶𝐴) (𝐹𝑘) = X𝑘𝐵 (𝐹𝑘))
38 ixpeq2 8458 . . . . . . . . . . 11 (∀𝑘𝐵 ((𝐹𝐵)‘𝑘) = (𝐹𝑘) → X𝑘𝐵 ((𝐹𝐵)‘𝑘) = X𝑘𝐵 (𝐹𝑘))
39 fvres 6664 . . . . . . . . . . . 12 (𝑘𝐵 → ((𝐹𝐵)‘𝑘) = (𝐹𝑘))
4039unieqd 4814 . . . . . . . . . . 11 (𝑘𝐵 ((𝐹𝐵)‘𝑘) = (𝐹𝑘))
4138, 40mprg 3120 . . . . . . . . . 10 X𝑘𝐵 ((𝐹𝐵)‘𝑘) = X𝑘𝐵 (𝐹𝑘)
42 ssun2 4100 . . . . . . . . . . . . 13 𝐵 ⊆ (𝐴𝐵)
4342, 17sseqtrrid 3968 . . . . . . . . . . . 12 (𝜑𝐵𝐶)
4415, 43ssexd 5192 . . . . . . . . . . 11 (𝜑𝐵 ∈ V)
4520, 43fssresd 6519 . . . . . . . . . . 11 (𝜑 → (𝐹𝐵):𝐵⟶Top)
46 ptunhmeo.l . . . . . . . . . . . 12 𝐿 = (∏t‘(𝐹𝐵))
4746ptuni 22199 . . . . . . . . . . 11 ((𝐵 ∈ V ∧ (𝐹𝐵):𝐵⟶Top) → X𝑘𝐵 ((𝐹𝐵)‘𝑘) = 𝐿)
4844, 45, 47syl2anc 587 . . . . . . . . . 10 (𝜑X𝑘𝐵 ((𝐹𝐵)‘𝑘) = 𝐿)
4941, 48syl5eqr 2847 . . . . . . . . 9 (𝜑X𝑘𝐵 (𝐹𝑘) = 𝐿)
50 ptunhmeo.y . . . . . . . . 9 𝑌 = 𝐿
5149, 50eqtr4di 2851 . . . . . . . 8 (𝜑X𝑘𝐵 (𝐹𝑘) = 𝑌)
5237, 51eqtrd 2833 . . . . . . 7 (𝜑X𝑘 ∈ (𝐶𝐴) (𝐹𝑘) = 𝑌)
5352adantr 484 . . . . . 6 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → X𝑘 ∈ (𝐶𝐴) (𝐹𝑘) = 𝑌)
5431, 53eleqtrrd 2893 . . . . 5 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (2nd𝑤) ∈ X𝑘 ∈ (𝐶𝐴) (𝐹𝑘))
5518adantr 484 . . . . 5 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → 𝐴𝐶)
56 undifixp 8481 . . . . 5 (((1st𝑤) ∈ X𝑘𝐴 (𝐹𝑘) ∧ (2nd𝑤) ∈ X𝑘 ∈ (𝐶𝐴) (𝐹𝑘) ∧ 𝐴𝐶) → ((1st𝑤) ∪ (2nd𝑤)) ∈ X𝑘𝐶 (𝐹𝑘))
5729, 54, 55, 56syl3anc 1368 . . . 4 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → ((1st𝑤) ∪ (2nd𝑤)) ∈ X𝑘𝐶 (𝐹𝑘))
58 ptunhmeo.j . . . . . . 7 𝐽 = (∏t𝐹)
5958ptuni 22199 . . . . . 6 ((𝐶𝑉𝐹:𝐶⟶Top) → X𝑘𝐶 (𝐹𝑘) = 𝐽)
6015, 20, 59syl2anc 587 . . . . 5 (𝜑X𝑘𝐶 (𝐹𝑘) = 𝐽)
6160adantr 484 . . . 4 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → X𝑘𝐶 (𝐹𝑘) = 𝐽)
6257, 61eleqtrd 2892 . . 3 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → ((1st𝑤) ∪ (2nd𝑤)) ∈ 𝐽)
6318adantr 484 . . . . . 6 ((𝜑𝑧 𝐽) → 𝐴𝐶)
6460eleq2d 2875 . . . . . . 7 (𝜑 → (𝑧X𝑘𝐶 (𝐹𝑘) ↔ 𝑧 𝐽))
6564biimpar 481 . . . . . 6 ((𝜑𝑧 𝐽) → 𝑧X𝑘𝐶 (𝐹𝑘))
66 resixp 8480 . . . . . 6 ((𝐴𝐶𝑧X𝑘𝐶 (𝐹𝑘)) → (𝑧𝐴) ∈ X𝑘𝐴 (𝐹𝑘))
6763, 65, 66syl2anc 587 . . . . 5 ((𝜑𝑧 𝐽) → (𝑧𝐴) ∈ X𝑘𝐴 (𝐹𝑘))
6827adantr 484 . . . . 5 ((𝜑𝑧 𝐽) → X𝑘𝐴 (𝐹𝑘) = 𝑋)
6967, 68eleqtrd 2892 . . . 4 ((𝜑𝑧 𝐽) → (𝑧𝐴) ∈ 𝑋)
7043adantr 484 . . . . . 6 ((𝜑𝑧 𝐽) → 𝐵𝐶)
71 resixp 8480 . . . . . 6 ((𝐵𝐶𝑧X𝑘𝐶 (𝐹𝑘)) → (𝑧𝐵) ∈ X𝑘𝐵 (𝐹𝑘))
7270, 65, 71syl2anc 587 . . . . 5 ((𝜑𝑧 𝐽) → (𝑧𝐵) ∈ X𝑘𝐵 (𝐹𝑘))
7351adantr 484 . . . . 5 ((𝜑𝑧 𝐽) → X𝑘𝐵 (𝐹𝑘) = 𝑌)
7472, 73eleqtrd 2892 . . . 4 ((𝜑𝑧 𝐽) → (𝑧𝐵) ∈ 𝑌)
7569, 74opelxpd 5557 . . 3 ((𝜑𝑧 𝐽) → ⟨(𝑧𝐴), (𝑧𝐵)⟩ ∈ (𝑋 × 𝑌))
76 eqop 7713 . . . . 5 (𝑤 ∈ (𝑋 × 𝑌) → (𝑤 = ⟨(𝑧𝐴), (𝑧𝐵)⟩ ↔ ((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵))))
7776ad2antrl 727 . . . 4 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (𝑤 = ⟨(𝑧𝐴), (𝑧𝐵)⟩ ↔ ((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵))))
7865adantrl 715 . . . . . . . . 9 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → 𝑧X𝑘𝐶 (𝐹𝑘))
79 ixpfn 8450 . . . . . . . . 9 (𝑧X𝑘𝐶 (𝐹𝑘) → 𝑧 Fn 𝐶)
80 fnresdm 6438 . . . . . . . . 9 (𝑧 Fn 𝐶 → (𝑧𝐶) = 𝑧)
8178, 79, 803syl 18 . . . . . . . 8 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (𝑧𝐶) = 𝑧)
8217reseq2d 5818 . . . . . . . . 9 (𝜑 → (𝑧𝐶) = (𝑧 ↾ (𝐴𝐵)))
8382adantr 484 . . . . . . . 8 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (𝑧𝐶) = (𝑧 ↾ (𝐴𝐵)))
8481, 83eqtr3d 2835 . . . . . . 7 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → 𝑧 = (𝑧 ↾ (𝐴𝐵)))
85 resundi 5832 . . . . . . 7 (𝑧 ↾ (𝐴𝐵)) = ((𝑧𝐴) ∪ (𝑧𝐵))
8684, 85eqtrdi 2849 . . . . . 6 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → 𝑧 = ((𝑧𝐴) ∪ (𝑧𝐵)))
87 uneq12 4085 . . . . . . 7 (((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵)) → ((1st𝑤) ∪ (2nd𝑤)) = ((𝑧𝐴) ∪ (𝑧𝐵)))
8887eqeq2d 2809 . . . . . 6 (((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵)) → (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) ↔ 𝑧 = ((𝑧𝐴) ∪ (𝑧𝐵))))
8986, 88syl5ibrcom 250 . . . . 5 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵)) → 𝑧 = ((1st𝑤) ∪ (2nd𝑤))))
90 ixpfn 8450 . . . . . . . . . . . 12 ((1st𝑤) ∈ X𝑘𝐴 (𝐹𝑘) → (1st𝑤) Fn 𝐴)
9129, 90syl 17 . . . . . . . . . . 11 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (1st𝑤) Fn 𝐴)
9291adantrr 716 . . . . . . . . . 10 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (1st𝑤) Fn 𝐴)
93 dffn2 6489 . . . . . . . . . 10 ((1st𝑤) Fn 𝐴 ↔ (1st𝑤):𝐴⟶V)
9492, 93sylib 221 . . . . . . . . 9 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (1st𝑤):𝐴⟶V)
9551adantr 484 . . . . . . . . . . . . 13 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → X𝑘𝐵 (𝐹𝑘) = 𝑌)
9631, 95eleqtrrd 2893 . . . . . . . . . . . 12 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (2nd𝑤) ∈ X𝑘𝐵 (𝐹𝑘))
97 ixpfn 8450 . . . . . . . . . . . 12 ((2nd𝑤) ∈ X𝑘𝐵 (𝐹𝑘) → (2nd𝑤) Fn 𝐵)
9896, 97syl 17 . . . . . . . . . . 11 ((𝜑𝑤 ∈ (𝑋 × 𝑌)) → (2nd𝑤) Fn 𝐵)
9998adantrr 716 . . . . . . . . . 10 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (2nd𝑤) Fn 𝐵)
100 dffn2 6489 . . . . . . . . . 10 ((2nd𝑤) Fn 𝐵 ↔ (2nd𝑤):𝐵⟶V)
10199, 100sylib 221 . . . . . . . . 9 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (2nd𝑤):𝐵⟶V)
102 res0 5822 . . . . . . . . . . 11 ((1st𝑤) ↾ ∅) = ∅
103 res0 5822 . . . . . . . . . . 11 ((2nd𝑤) ↾ ∅) = ∅
104102, 103eqtr4i 2824 . . . . . . . . . 10 ((1st𝑤) ↾ ∅) = ((2nd𝑤) ↾ ∅)
10533adantr 484 . . . . . . . . . . 11 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (𝐴𝐵) = ∅)
106105reseq2d 5818 . . . . . . . . . 10 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → ((1st𝑤) ↾ (𝐴𝐵)) = ((1st𝑤) ↾ ∅))
107105reseq2d 5818 . . . . . . . . . 10 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → ((2nd𝑤) ↾ (𝐴𝐵)) = ((2nd𝑤) ↾ ∅))
108104, 106, 1073eqtr4a 2859 . . . . . . . . 9 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → ((1st𝑤) ↾ (𝐴𝐵)) = ((2nd𝑤) ↾ (𝐴𝐵)))
109 fresaunres1 6525 . . . . . . . . 9 (((1st𝑤):𝐴⟶V ∧ (2nd𝑤):𝐵⟶V ∧ ((1st𝑤) ↾ (𝐴𝐵)) = ((2nd𝑤) ↾ (𝐴𝐵))) → (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴) = (1st𝑤))
11094, 101, 108, 109syl3anc 1368 . . . . . . . 8 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴) = (1st𝑤))
111110eqcomd 2804 . . . . . . 7 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (1st𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴))
112 fresaunres2 6524 . . . . . . . . 9 (((1st𝑤):𝐴⟶V ∧ (2nd𝑤):𝐵⟶V ∧ ((1st𝑤) ↾ (𝐴𝐵)) = ((2nd𝑤) ↾ (𝐴𝐵))) → (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵) = (2nd𝑤))
11394, 101, 108, 112syl3anc 1368 . . . . . . . 8 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵) = (2nd𝑤))
114113eqcomd 2804 . . . . . . 7 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (2nd𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵))
115111, 114jca 515 . . . . . 6 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → ((1st𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴) ∧ (2nd𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵)))
116 reseq1 5812 . . . . . . . 8 (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) → (𝑧𝐴) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴))
117116eqeq2d 2809 . . . . . . 7 (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) → ((1st𝑤) = (𝑧𝐴) ↔ (1st𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴)))
118 reseq1 5812 . . . . . . . 8 (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) → (𝑧𝐵) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵))
119118eqeq2d 2809 . . . . . . 7 (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) → ((2nd𝑤) = (𝑧𝐵) ↔ (2nd𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵)))
120117, 119anbi12d 633 . . . . . 6 (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) → (((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵)) ↔ ((1st𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐴) ∧ (2nd𝑤) = (((1st𝑤) ∪ (2nd𝑤)) ↾ 𝐵))))
121115, 120syl5ibrcom 250 . . . . 5 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (𝑧 = ((1st𝑤) ∪ (2nd𝑤)) → ((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵))))
12289, 121impbid 215 . . . 4 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (((1st𝑤) = (𝑧𝐴) ∧ (2nd𝑤) = (𝑧𝐵)) ↔ 𝑧 = ((1st𝑤) ∪ (2nd𝑤))))
12377, 122bitrd 282 . . 3 ((𝜑 ∧ (𝑤 ∈ (𝑋 × 𝑌) ∧ 𝑧 𝐽)) → (𝑤 = ⟨(𝑧𝐴), (𝑧𝐵)⟩ ↔ 𝑧 = ((1st𝑤) ∪ (2nd𝑤))))
1248, 62, 75, 123f1ocnv2d 7378 . 2 (𝜑 → (𝐺:(𝑋 × 𝑌)–1-1-onto 𝐽𝐺 = (𝑧 𝐽 ↦ ⟨(𝑧𝐴), (𝑧𝐵)⟩)))
125124simprd 499 1 (𝜑𝐺 = (𝑧 𝐽 ↦ ⟨(𝑧𝐴), (𝑧𝐵)⟩))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wa 399   = wceq 1538  wcel 2111  Vcvv 3441  cdif 3878  cun 3879  cin 3880  wss 3881  c0 4243  cop 4531   cuni 4800  cmpt 5110   × cxp 5517  ccnv 5518  cres 5521   Fn wfn 6319  wf 6320  1-1-ontowf1o 6323  cfv 6324  cmpo 7137  1st c1st 7669  2nd c2nd 7670  Xcixp 8444  tcpt 16704  Topctop 21498
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 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-int 4839  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-1st 7671  df-2nd 7672  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-1o 8085  df-oadd 8089  df-er 8272  df-ixp 8445  df-en 8493  df-fin 8496  df-fi 8859  df-topgen 16709  df-pt 16710  df-top 21499  df-bases 21551
This theorem is referenced by:  ptunhmeo  22413
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