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Theorem fmucndlem 22005
 Description: Lemma for fmucnd 22006. (Contributed by Thierry Arnoux, 19-Nov-2017.)
Assertion
Ref Expression
fmucndlem ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ((𝐹𝐴) × (𝐹𝐴)))
Distinct variable groups:   𝑥,𝑦,𝐴   𝑥,𝐹,𝑦   𝑥,𝑋,𝑦

Proof of Theorem fmucndlem
Dummy variable 𝑝 is distinct from all other variables.
StepHypRef Expression
1 df-ima 5087 . . 3 ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ran ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴))
2 simpr 477 . . . . 5 ((𝐹 Fn 𝑋𝐴𝑋) → 𝐴𝑋)
3 resmpt2 6711 . . . . 5 ((𝐴𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴)) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
42, 3sylancom 700 . . . 4 ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴)) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
54rneqd 5313 . . 3 ((𝐹 Fn 𝑋𝐴𝑋) → ran ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴)) = ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
61, 5syl5eq 2667 . 2 ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
7 vex 3189 . . . . . . . . . . . . 13 𝑥 ∈ V
8 vex 3189 . . . . . . . . . . . . 13 𝑦 ∈ V
97, 8op1std 7123 . . . . . . . . . . . 12 (𝑝 = ⟨𝑥, 𝑦⟩ → (1st𝑝) = 𝑥)
109fveq2d 6152 . . . . . . . . . . 11 (𝑝 = ⟨𝑥, 𝑦⟩ → (𝐹‘(1st𝑝)) = (𝐹𝑥))
117, 8op2ndd 7124 . . . . . . . . . . . 12 (𝑝 = ⟨𝑥, 𝑦⟩ → (2nd𝑝) = 𝑦)
1211fveq2d 6152 . . . . . . . . . . 11 (𝑝 = ⟨𝑥, 𝑦⟩ → (𝐹‘(2nd𝑝)) = (𝐹𝑦))
1310, 12opeq12d 4378 . . . . . . . . . 10 (𝑝 = ⟨𝑥, 𝑦⟩ → ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩)
1413mpt2mpt 6705 . . . . . . . . 9 (𝑝 ∈ (𝐴 × 𝐴) ↦ ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)
1514eqcomi 2630 . . . . . . . 8 (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = (𝑝 ∈ (𝐴 × 𝐴) ↦ ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩)
1615rneqi 5312 . . . . . . 7 ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = ran (𝑝 ∈ (𝐴 × 𝐴) ↦ ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩)
17 fvex 6158 . . . . . . . 8 (𝐹‘(1st𝑝)) ∈ V
1817a1i 11 . . . . . . 7 ((⊤ ∧ 𝑝 ∈ (𝐴 × 𝐴)) → (𝐹‘(1st𝑝)) ∈ V)
19 fvex 6158 . . . . . . . 8 (𝐹‘(2nd𝑝)) ∈ V
2019a1i 11 . . . . . . 7 ((⊤ ∧ 𝑝 ∈ (𝐴 × 𝐴)) → (𝐹‘(2nd𝑝)) ∈ V)
2116, 18, 20fliftrel 6512 . . . . . 6 (⊤ → ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ⊆ (V × V))
2221trud 1490 . . . . 5 ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ⊆ (V × V)
2322sseli 3579 . . . 4 (𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) → 𝑝 ∈ (V × V))
2423adantl 482 . . 3 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)) → 𝑝 ∈ (V × V))
25 xpss 5187 . . . . 5 ((𝐹𝐴) × (𝐹𝐴)) ⊆ (V × V)
2625sseli 3579 . . . 4 (𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴)) → 𝑝 ∈ (V × V))
2726adantl 482 . . 3 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴))) → 𝑝 ∈ (V × V))
28 fvelimab 6210 . . . . . . . 8 ((𝐹 Fn 𝑋𝐴𝑋) → ((1st𝑝) ∈ (𝐹𝐴) ↔ ∃𝑥𝐴 (𝐹𝑥) = (1st𝑝)))
29 fvelimab 6210 . . . . . . . 8 ((𝐹 Fn 𝑋𝐴𝑋) → ((2nd𝑝) ∈ (𝐹𝐴) ↔ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝)))
3028, 29anbi12d 746 . . . . . . 7 ((𝐹 Fn 𝑋𝐴𝑋) → (((1st𝑝) ∈ (𝐹𝐴) ∧ (2nd𝑝) ∈ (𝐹𝐴)) ↔ (∃𝑥𝐴 (𝐹𝑥) = (1st𝑝) ∧ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝))))
31 eqid 2621 . . . . . . . . 9 (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)
32 opex 4893 . . . . . . . . 9 ⟨(𝐹𝑥), (𝐹𝑦)⟩ ∈ V
3331, 32elrnmpt2 6726 . . . . . . . 8 (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ∃𝑥𝐴𝑦𝐴 ⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩)
34 eqcom 2628 . . . . . . . . . 10 (⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩ ↔ ⟨(𝐹𝑥), (𝐹𝑦)⟩ = ⟨(1st𝑝), (2nd𝑝)⟩)
35 fvex 6158 . . . . . . . . . . 11 (1st𝑝) ∈ V
36 fvex 6158 . . . . . . . . . . 11 (2nd𝑝) ∈ V
3735, 36opth2 4909 . . . . . . . . . 10 (⟨(𝐹𝑥), (𝐹𝑦)⟩ = ⟨(1st𝑝), (2nd𝑝)⟩ ↔ ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)))
3834, 37bitri 264 . . . . . . . . 9 (⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩ ↔ ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)))
39382rexbii 3035 . . . . . . . 8 (∃𝑥𝐴𝑦𝐴 ⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩ ↔ ∃𝑥𝐴𝑦𝐴 ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)))
40 reeanv 3097 . . . . . . . 8 (∃𝑥𝐴𝑦𝐴 ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)) ↔ (∃𝑥𝐴 (𝐹𝑥) = (1st𝑝) ∧ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝)))
4133, 39, 403bitri 286 . . . . . . 7 (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ (∃𝑥𝐴 (𝐹𝑥) = (1st𝑝) ∧ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝)))
4230, 41syl6rbbr 279 . . . . . 6 ((𝐹 Fn 𝑋𝐴𝑋) → (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ((1st𝑝) ∈ (𝐹𝐴) ∧ (2nd𝑝) ∈ (𝐹𝐴))))
43 opelxp 5106 . . . . . 6 (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴)) ↔ ((1st𝑝) ∈ (𝐹𝐴) ∧ (2nd𝑝) ∈ (𝐹𝐴)))
4442, 43syl6bbr 278 . . . . 5 ((𝐹 Fn 𝑋𝐴𝑋) → (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴))))
4544adantr 481 . . . 4 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴))))
46 1st2nd2 7150 . . . . . 6 (𝑝 ∈ (V × V) → 𝑝 = ⟨(1st𝑝), (2nd𝑝)⟩)
4746adantl 482 . . . . 5 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → 𝑝 = ⟨(1st𝑝), (2nd𝑝)⟩)
4847eleq1d 2683 . . . 4 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)))
4947eleq1d 2683 . . . 4 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴)) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴))))
5045, 48, 493bitr4d 300 . . 3 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ 𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴))))
5124, 27, 50eqrdav 2620 . 2 ((𝐹 Fn 𝑋𝐴𝑋) → ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = ((𝐹𝐴) × (𝐹𝐴)))
526, 51eqtrd 2655 1 ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ((𝐹𝐴) × (𝐹𝐴)))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   = wceq 1480  ⊤wtru 1481   ∈ wcel 1987  ∃wrex 2908  Vcvv 3186   ⊆ wss 3555  ⟨cop 4154   ↦ cmpt 4673   × cxp 5072  ran crn 5075   ↾ cres 5076   “ cima 5077   Fn wfn 5842  ‘cfv 5847   ↦ cmpt2 6606  1st c1st 7111  2nd c2nd 7112 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-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902 This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  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-ral 2912  df-rex 2913  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-nul 3892  df-if 4059  df-sn 4149  df-pr 4151  df-op 4155  df-uni 4403  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-id 4989  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-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-fv 5855  df-oprab 6608  df-mpt2 6609  df-1st 7113  df-2nd 7114 This theorem is referenced by:  fmucnd  22006
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