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Theorem funressnbrafv2 46547
Description: The second argument of a binary relation on a function is the function's value, analogous to funbrfv 6942. (Contributed by AV, 7-Sep-2022.)
Assertion
Ref Expression
funressnbrafv2 (((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) → (𝐴𝐹𝐵 → (𝐹''''𝐴) = 𝐵))

Proof of Theorem funressnbrafv2
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 simpllr 775 . . 3 ((((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝐵) → 𝐵𝑊)
2 eleq1 2816 . . . . . . . 8 (𝑥 = 𝐵 → (𝑥𝑊𝐵𝑊))
32anbi2d 628 . . . . . . 7 (𝑥 = 𝐵 → ((𝐴𝑉𝑥𝑊) ↔ (𝐴𝑉𝐵𝑊)))
43anbi1d 629 . . . . . 6 (𝑥 = 𝐵 → (((𝐴𝑉𝑥𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ↔ ((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴}))))
5 breq2 5146 . . . . . 6 (𝑥 = 𝐵 → (𝐴𝐹𝑥𝐴𝐹𝐵))
64, 5anbi12d 630 . . . . 5 (𝑥 = 𝐵 → ((((𝐴𝑉𝑥𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝑥) ↔ (((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝐵)))
7 eqeq2 2739 . . . . 5 (𝑥 = 𝐵 → ((𝐹''''𝐴) = 𝑥 ↔ (𝐹''''𝐴) = 𝐵))
86, 7imbi12d 344 . . . 4 (𝑥 = 𝐵 → (((((𝐴𝑉𝑥𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝑥) → (𝐹''''𝐴) = 𝑥) ↔ ((((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝐵) → (𝐹''''𝐴) = 𝐵)))
9 id 22 . . . . 5 (𝐴𝐹𝑥𝐴𝐹𝑥)
10 funressneu 46352 . . . . . 6 (((𝐴𝑉𝑥𝑊) ∧ Fun (𝐹 ↾ {𝐴}) ∧ 𝐴𝐹𝑥) → ∃!𝑥 𝐴𝐹𝑥)
11103expa 1116 . . . . 5 ((((𝐴𝑉𝑥𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝑥) → ∃!𝑥 𝐴𝐹𝑥)
12 tz6.12-1-afv2 46544 . . . . 5 ((𝐴𝐹𝑥 ∧ ∃!𝑥 𝐴𝐹𝑥) → (𝐹''''𝐴) = 𝑥)
139, 11, 12syl2an2 685 . . . 4 ((((𝐴𝑉𝑥𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝑥) → (𝐹''''𝐴) = 𝑥)
148, 13vtoclg 3538 . . 3 (𝐵𝑊 → ((((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝐵) → (𝐹''''𝐴) = 𝐵))
151, 14mpcom 38 . 2 ((((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) ∧ 𝐴𝐹𝐵) → (𝐹''''𝐴) = 𝐵)
1615ex 412 1 (((𝐴𝑉𝐵𝑊) ∧ Fun (𝐹 ↾ {𝐴})) → (𝐴𝐹𝐵 → (𝐹''''𝐴) = 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1534  wcel 2099  ∃!weu 2557  {csn 4624   class class class wbr 5142  cres 5674  Fun wfun 6536  ''''cafv2 46511
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1964  ax-7 2004  ax-8 2101  ax-9 2109  ax-10 2130  ax-11 2147  ax-12 2164  ax-ext 2698  ax-sep 5293  ax-nul 5300  ax-pow 5359  ax-pr 5423
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 847  df-3an 1087  df-tru 1537  df-fal 1547  df-ex 1775  df-nf 1779  df-sb 2061  df-mo 2529  df-eu 2558  df-clab 2705  df-cleq 2719  df-clel 2805  df-nfc 2880  df-ral 3057  df-rex 3066  df-rab 3428  df-v 3471  df-dif 3947  df-un 3949  df-in 3951  df-ss 3961  df-nul 4319  df-if 4525  df-sn 4625  df-pr 4627  df-op 4631  df-uni 4904  df-br 5143  df-opab 5205  df-id 5570  df-xp 5678  df-rel 5679  df-cnv 5680  df-co 5681  df-dm 5682  df-res 5684  df-iota 6494  df-fun 6544  df-fn 6545  df-dfat 46422  df-afv2 46512
This theorem is referenced by:  dfatbrafv2b  46548
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