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Theorem unccur 33522
Description: Uncurrying of currying. (Contributed by Brendan Leahy, 5-Jun-2021.)
Assertion
Ref Expression
unccur ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → uncurry curry 𝐹 = 𝐹)

Proof of Theorem unccur
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ffn 6083 . . . . . . . . 9 (𝐹:(𝐴 × 𝐵)⟶𝐶𝐹 Fn (𝐴 × 𝐵))
21anim1i 591 . . . . . . . 8 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅})) → (𝐹 Fn (𝐴 × 𝐵) ∧ 𝐵 ∈ (𝑉 ∖ {∅})))
323adant3 1101 . . . . . . 7 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → (𝐹 Fn (𝐴 × 𝐵) ∧ 𝐵 ∈ (𝑉 ∖ {∅})))
4 3anass 1059 . . . . . . . . . . 11 ((𝐹 Fn (𝐴 × 𝐵) ∧ 𝑥𝐴𝑦𝐵) ↔ (𝐹 Fn (𝐴 × 𝐵) ∧ (𝑥𝐴𝑦𝐵)))
5 curfv 33519 . . . . . . . . . . 11 (((𝐹 Fn (𝐴 × 𝐵) ∧ 𝑥𝐴𝑦𝐵) ∧ 𝐵 ∈ (𝑉 ∖ {∅})) → ((curry 𝐹𝑥)‘𝑦) = (𝑥𝐹𝑦))
64, 5sylanbr 489 . . . . . . . . . 10 (((𝐹 Fn (𝐴 × 𝐵) ∧ (𝑥𝐴𝑦𝐵)) ∧ 𝐵 ∈ (𝑉 ∖ {∅})) → ((curry 𝐹𝑥)‘𝑦) = (𝑥𝐹𝑦))
76an32s 863 . . . . . . . . 9 (((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐵 ∈ (𝑉 ∖ {∅})) ∧ (𝑥𝐴𝑦𝐵)) → ((curry 𝐹𝑥)‘𝑦) = (𝑥𝐹𝑦))
87eqeq1d 2653 . . . . . . . 8 (((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐵 ∈ (𝑉 ∖ {∅})) ∧ (𝑥𝐴𝑦𝐵)) → (((curry 𝐹𝑥)‘𝑦) = 𝑧 ↔ (𝑥𝐹𝑦) = 𝑧))
9 eqcom 2658 . . . . . . . 8 ((𝑥𝐹𝑦) = 𝑧𝑧 = (𝑥𝐹𝑦))
108, 9syl6bb 276 . . . . . . 7 (((𝐹 Fn (𝐴 × 𝐵) ∧ 𝐵 ∈ (𝑉 ∖ {∅})) ∧ (𝑥𝐴𝑦𝐵)) → (((curry 𝐹𝑥)‘𝑦) = 𝑧𝑧 = (𝑥𝐹𝑦)))
113, 10sylan 487 . . . . . 6 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ (𝑥𝐴𝑦𝐵)) → (((curry 𝐹𝑥)‘𝑦) = 𝑧𝑧 = (𝑥𝐹𝑦)))
12 curf 33517 . . . . . . . . . 10 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → curry 𝐹:𝐴⟶(𝐶𝑚 𝐵))
1312ffvelrnda 6399 . . . . . . . . 9 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ 𝑥𝐴) → (curry 𝐹𝑥) ∈ (𝐶𝑚 𝐵))
14 elmapfn 7922 . . . . . . . . 9 ((curry 𝐹𝑥) ∈ (𝐶𝑚 𝐵) → (curry 𝐹𝑥) Fn 𝐵)
1513, 14syl 17 . . . . . . . 8 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ 𝑥𝐴) → (curry 𝐹𝑥) Fn 𝐵)
16 fnbrfvb 6274 . . . . . . . 8 (((curry 𝐹𝑥) Fn 𝐵𝑦𝐵) → (((curry 𝐹𝑥)‘𝑦) = 𝑧𝑦(curry 𝐹𝑥)𝑧))
1715, 16sylan 487 . . . . . . 7 ((((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ 𝑥𝐴) ∧ 𝑦𝐵) → (((curry 𝐹𝑥)‘𝑦) = 𝑧𝑦(curry 𝐹𝑥)𝑧))
1817anasss 680 . . . . . 6 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ (𝑥𝐴𝑦𝐵)) → (((curry 𝐹𝑥)‘𝑦) = 𝑧𝑦(curry 𝐹𝑥)𝑧))
19 ibar 524 . . . . . . 7 ((𝑥𝐴𝑦𝐵) → (𝑧 = (𝑥𝐹𝑦) ↔ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))))
2019adantl 481 . . . . . 6 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ (𝑥𝐴𝑦𝐵)) → (𝑧 = (𝑥𝐹𝑦) ↔ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))))
2111, 18, 203bitr3d 298 . . . . 5 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ (𝑥𝐴𝑦𝐵)) → (𝑦(curry 𝐹𝑥)𝑧 ↔ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))))
22 df-br 4686 . . . . . . . . . . 11 (𝑦(curry 𝐹𝑥)𝑧 ↔ ⟨𝑦, 𝑧⟩ ∈ (curry 𝐹𝑥))
23 elfvdm 6258 . . . . . . . . . . 11 (⟨𝑦, 𝑧⟩ ∈ (curry 𝐹𝑥) → 𝑥 ∈ dom curry 𝐹)
2422, 23sylbi 207 . . . . . . . . . 10 (𝑦(curry 𝐹𝑥)𝑧𝑥 ∈ dom curry 𝐹)
25 fdm 6089 . . . . . . . . . . . 12 (curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) → dom curry 𝐹 = 𝐴)
2625eleq2d 2716 . . . . . . . . . . 11 (curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) → (𝑥 ∈ dom curry 𝐹𝑥𝐴))
2726biimpa 500 . . . . . . . . . 10 ((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑥 ∈ dom curry 𝐹) → 𝑥𝐴)
2824, 27sylan2 490 . . . . . . . . 9 ((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑦(curry 𝐹𝑥)𝑧) → 𝑥𝐴)
29 ffvelrn 6397 . . . . . . . . . . . . 13 ((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑥𝐴) → (curry 𝐹𝑥) ∈ (𝐶𝑚 𝐵))
30 elmapi 7921 . . . . . . . . . . . . 13 ((curry 𝐹𝑥) ∈ (𝐶𝑚 𝐵) → (curry 𝐹𝑥):𝐵𝐶)
31 fdm 6089 . . . . . . . . . . . . 13 ((curry 𝐹𝑥):𝐵𝐶 → dom (curry 𝐹𝑥) = 𝐵)
3229, 30, 313syl 18 . . . . . . . . . . . 12 ((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑥𝐴) → dom (curry 𝐹𝑥) = 𝐵)
33 vex 3234 . . . . . . . . . . . . 13 𝑦 ∈ V
34 vex 3234 . . . . . . . . . . . . 13 𝑧 ∈ V
3533, 34breldm 5361 . . . . . . . . . . . 12 (𝑦(curry 𝐹𝑥)𝑧𝑦 ∈ dom (curry 𝐹𝑥))
36 eleq2 2719 . . . . . . . . . . . . 13 (dom (curry 𝐹𝑥) = 𝐵 → (𝑦 ∈ dom (curry 𝐹𝑥) ↔ 𝑦𝐵))
3736biimpa 500 . . . . . . . . . . . 12 ((dom (curry 𝐹𝑥) = 𝐵𝑦 ∈ dom (curry 𝐹𝑥)) → 𝑦𝐵)
3832, 35, 37syl2an 493 . . . . . . . . . . 11 (((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑥𝐴) ∧ 𝑦(curry 𝐹𝑥)𝑧) → 𝑦𝐵)
3938an32s 863 . . . . . . . . . 10 (((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑦(curry 𝐹𝑥)𝑧) ∧ 𝑥𝐴) → 𝑦𝐵)
4028, 39mpdan 703 . . . . . . . . 9 ((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑦(curry 𝐹𝑥)𝑧) → 𝑦𝐵)
4128, 40jca 553 . . . . . . . 8 ((curry 𝐹:𝐴⟶(𝐶𝑚 𝐵) ∧ 𝑦(curry 𝐹𝑥)𝑧) → (𝑥𝐴𝑦𝐵))
4212, 41sylan 487 . . . . . . 7 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ 𝑦(curry 𝐹𝑥)𝑧) → (𝑥𝐴𝑦𝐵))
4342stoic1a 1737 . . . . . 6 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ ¬ (𝑥𝐴𝑦𝐵)) → ¬ 𝑦(curry 𝐹𝑥)𝑧)
44 simpl 472 . . . . . . . 8 (((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦)) → (𝑥𝐴𝑦𝐵))
4544con3i 150 . . . . . . 7 (¬ (𝑥𝐴𝑦𝐵) → ¬ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦)))
4645adantl 481 . . . . . 6 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ ¬ (𝑥𝐴𝑦𝐵)) → ¬ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦)))
4743, 462falsed 365 . . . . 5 (((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) ∧ ¬ (𝑥𝐴𝑦𝐵)) → (𝑦(curry 𝐹𝑥)𝑧 ↔ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))))
4821, 47pm2.61dan 849 . . . 4 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → (𝑦(curry 𝐹𝑥)𝑧 ↔ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))))
4948oprabbidv 6751 . . 3 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ 𝑦(curry 𝐹𝑥)𝑧} = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))})
50 df-unc 7439 . . 3 uncurry curry 𝐹 = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ 𝑦(curry 𝐹𝑥)𝑧}
51 df-mpt2 6695 . . 3 (𝑥𝐴, 𝑦𝐵 ↦ (𝑥𝐹𝑦)) = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = (𝑥𝐹𝑦))}
5249, 50, 513eqtr4g 2710 . 2 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → uncurry curry 𝐹 = (𝑥𝐴, 𝑦𝐵 ↦ (𝑥𝐹𝑦)))
53 fnov 6810 . . . 4 (𝐹 Fn (𝐴 × 𝐵) ↔ 𝐹 = (𝑥𝐴, 𝑦𝐵 ↦ (𝑥𝐹𝑦)))
541, 53sylib 208 . . 3 (𝐹:(𝐴 × 𝐵)⟶𝐶𝐹 = (𝑥𝐴, 𝑦𝐵 ↦ (𝑥𝐹𝑦)))
55543ad2ant1 1102 . 2 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → 𝐹 = (𝑥𝐴, 𝑦𝐵 ↦ (𝑥𝐹𝑦)))
5652, 55eqtr4d 2688 1 ((𝐹:(𝐴 × 𝐵)⟶𝐶𝐵 ∈ (𝑉 ∖ {∅}) ∧ 𝐶𝑊) → uncurry curry 𝐹 = 𝐹)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 383  w3a 1054   = wceq 1523  wcel 2030  cdif 3604  c0 3948  {csn 4210  cop 4216   class class class wbr 4685   × cxp 5141  dom cdm 5143   Fn wfn 5921  wf 5922  cfv 5926  (class class class)co 6690  {coprab 6691  cmpt2 6692  curry ccur 7436  uncurry cunc 7437  𝑚 cmap 7899
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-reu 2948  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-op 4217  df-uni 4469  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-id 5053  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-1st 7210  df-2nd 7211  df-cur 7438  df-unc 7439  df-map 7901
This theorem is referenced by: (None)
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