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Theorem fmucndlem 23803
Description: Lemma for fmucnd 23804. (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 5689 . . 3 ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ran ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴))
2 simpr 485 . . . . 5 ((𝐹 Fn 𝑋𝐴𝑋) → 𝐴𝑋)
3 resmpo 7530 . . . . 5 ((𝐴𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴)) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
42, 3sylancom 588 . . . 4 ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴)) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
54rneqd 5937 . . 3 ((𝐹 Fn 𝑋𝐴𝑋) → ran ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↾ (𝐴 × 𝐴)) = ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
61, 5eqtrid 2784 . 2 ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩))
7 vex 3478 . . . . . . . . . . . . 13 𝑥 ∈ V
8 vex 3478 . . . . . . . . . . . . 13 𝑦 ∈ V
97, 8op1std 7987 . . . . . . . . . . . 12 (𝑝 = ⟨𝑥, 𝑦⟩ → (1st𝑝) = 𝑥)
109fveq2d 6895 . . . . . . . . . . 11 (𝑝 = ⟨𝑥, 𝑦⟩ → (𝐹‘(1st𝑝)) = (𝐹𝑥))
117, 8op2ndd 7988 . . . . . . . . . . . 12 (𝑝 = ⟨𝑥, 𝑦⟩ → (2nd𝑝) = 𝑦)
1211fveq2d 6895 . . . . . . . . . . 11 (𝑝 = ⟨𝑥, 𝑦⟩ → (𝐹‘(2nd𝑝)) = (𝐹𝑦))
1310, 12opeq12d 4881 . . . . . . . . . 10 (𝑝 = ⟨𝑥, 𝑦⟩ → ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩)
1413mpompt 7524 . . . . . . . . 9 (𝑝 ∈ (𝐴 × 𝐴) ↦ ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)
1514eqcomi 2741 . . . . . . . 8 (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = (𝑝 ∈ (𝐴 × 𝐴) ↦ ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩)
1615rneqi 5936 . . . . . . 7 ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = ran (𝑝 ∈ (𝐴 × 𝐴) ↦ ⟨(𝐹‘(1st𝑝)), (𝐹‘(2nd𝑝))⟩)
17 fvexd 6906 . . . . . . 7 ((⊤ ∧ 𝑝 ∈ (𝐴 × 𝐴)) → (𝐹‘(1st𝑝)) ∈ V)
18 fvexd 6906 . . . . . . 7 ((⊤ ∧ 𝑝 ∈ (𝐴 × 𝐴)) → (𝐹‘(2nd𝑝)) ∈ V)
1916, 17, 18fliftrel 7307 . . . . . 6 (⊤ → ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ⊆ (V × V))
2019mptru 1548 . . . . 5 ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ⊆ (V × V)
2120sseli 3978 . . . 4 (𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) → 𝑝 ∈ (V × V))
2221adantl 482 . . 3 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)) → 𝑝 ∈ (V × V))
23 xpss 5692 . . . . 5 ((𝐹𝐴) × (𝐹𝐴)) ⊆ (V × V)
2423sseli 3978 . . . 4 (𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴)) → 𝑝 ∈ (V × V))
2524adantl 482 . . 3 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴))) → 𝑝 ∈ (V × V))
26 eqid 2732 . . . . . . . . 9 (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)
27 opex 5464 . . . . . . . . 9 ⟨(𝐹𝑥), (𝐹𝑦)⟩ ∈ V
2826, 27elrnmpo 7547 . . . . . . . 8 (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ∃𝑥𝐴𝑦𝐴 ⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩)
29 eqcom 2739 . . . . . . . . . 10 (⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩ ↔ ⟨(𝐹𝑥), (𝐹𝑦)⟩ = ⟨(1st𝑝), (2nd𝑝)⟩)
30 fvex 6904 . . . . . . . . . . 11 (1st𝑝) ∈ V
31 fvex 6904 . . . . . . . . . . 11 (2nd𝑝) ∈ V
3230, 31opth2 5480 . . . . . . . . . 10 (⟨(𝐹𝑥), (𝐹𝑦)⟩ = ⟨(1st𝑝), (2nd𝑝)⟩ ↔ ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)))
3329, 32bitri 274 . . . . . . . . 9 (⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩ ↔ ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)))
34332rexbii 3129 . . . . . . . 8 (∃𝑥𝐴𝑦𝐴 ⟨(1st𝑝), (2nd𝑝)⟩ = ⟨(𝐹𝑥), (𝐹𝑦)⟩ ↔ ∃𝑥𝐴𝑦𝐴 ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)))
35 reeanv 3226 . . . . . . . 8 (∃𝑥𝐴𝑦𝐴 ((𝐹𝑥) = (1st𝑝) ∧ (𝐹𝑦) = (2nd𝑝)) ↔ (∃𝑥𝐴 (𝐹𝑥) = (1st𝑝) ∧ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝)))
3628, 34, 353bitri 296 . . . . . . 7 (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ (∃𝑥𝐴 (𝐹𝑥) = (1st𝑝) ∧ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝)))
37 fvelimab 6964 . . . . . . . 8 ((𝐹 Fn 𝑋𝐴𝑋) → ((1st𝑝) ∈ (𝐹𝐴) ↔ ∃𝑥𝐴 (𝐹𝑥) = (1st𝑝)))
38 fvelimab 6964 . . . . . . . 8 ((𝐹 Fn 𝑋𝐴𝑋) → ((2nd𝑝) ∈ (𝐹𝐴) ↔ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝)))
3937, 38anbi12d 631 . . . . . . 7 ((𝐹 Fn 𝑋𝐴𝑋) → (((1st𝑝) ∈ (𝐹𝐴) ∧ (2nd𝑝) ∈ (𝐹𝐴)) ↔ (∃𝑥𝐴 (𝐹𝑥) = (1st𝑝) ∧ ∃𝑦𝐴 (𝐹𝑦) = (2nd𝑝))))
4036, 39bitr4id 289 . . . . . 6 ((𝐹 Fn 𝑋𝐴𝑋) → (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ((1st𝑝) ∈ (𝐹𝐴) ∧ (2nd𝑝) ∈ (𝐹𝐴))))
41 opelxp 5712 . . . . . 6 (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴)) ↔ ((1st𝑝) ∈ (𝐹𝐴) ∧ (2nd𝑝) ∈ (𝐹𝐴)))
4240, 41bitr4di 288 . . . . 5 ((𝐹 Fn 𝑋𝐴𝑋) → (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴))))
4342adantr 481 . . . 4 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴))))
44 1st2nd2 8016 . . . . . 6 (𝑝 ∈ (V × V) → 𝑝 = ⟨(1st𝑝), (2nd𝑝)⟩)
4544adantl 482 . . . . 5 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → 𝑝 = ⟨(1st𝑝), (2nd𝑝)⟩)
4645eleq1d 2818 . . . 4 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩)))
4745eleq1d 2818 . . . 4 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴)) ↔ ⟨(1st𝑝), (2nd𝑝)⟩ ∈ ((𝐹𝐴) × (𝐹𝐴))))
4843, 46, 473bitr4d 310 . . 3 (((𝐹 Fn 𝑋𝐴𝑋) ∧ 𝑝 ∈ (V × V)) → (𝑝 ∈ ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) ↔ 𝑝 ∈ ((𝐹𝐴) × (𝐹𝐴))))
4922, 25, 48eqrdav 2731 . 2 ((𝐹 Fn 𝑋𝐴𝑋) → ran (𝑥𝐴, 𝑦𝐴 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) = ((𝐹𝐴) × (𝐹𝐴)))
506, 49eqtrd 2772 1 ((𝐹 Fn 𝑋𝐴𝑋) → ((𝑥𝑋, 𝑦𝑋 ↦ ⟨(𝐹𝑥), (𝐹𝑦)⟩) “ (𝐴 × 𝐴)) = ((𝐹𝐴) × (𝐹𝐴)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 396   = wceq 1541  wtru 1542  wcel 2106  wrex 3070  Vcvv 3474  wss 3948  cop 4634  cmpt 5231   × cxp 5674  ran crn 5677  cres 5678  cima 5679   Fn wfn 6538  cfv 6543  cmpo 7413  1st c1st 7975  2nd c2nd 7976
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-sep 5299  ax-nul 5306  ax-pr 5427  ax-un 7727
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3433  df-v 3476  df-sbc 3778  df-csb 3894  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-sn 4629  df-pr 4631  df-op 4635  df-uni 4909  df-iun 4999  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5574  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-rn 5687  df-res 5688  df-ima 5689  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-fv 6551  df-oprab 7415  df-mpo 7416  df-1st 7977  df-2nd 7978
This theorem is referenced by:  fmucnd  23804
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