Theorem fnoprabg 7479

Description: Functionality and domain of an operation class abstraction. (Contributed by NM, 28-Aug-2007.)

Assertion

Ref	Expression
fnoprabg	⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} Fn {⟨𝑥, 𝑦⟩ ∣ 𝜑})

Distinct variable groups:   𝑥,𝑦,𝑧   𝜑,𝑧

Allowed substitution hints:   𝜑(𝑥,𝑦)   𝜓(𝑥,𝑦,𝑧)

Proof of Theorem fnoprabg

Step	Hyp	Ref	Expression
1		eumo 2582	. . . . . 6 ⊢ (∃!𝑧𝜓 → ∃*𝑧𝜓)
2	1	imim2i 16	. . . . 5 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → ∃*𝑧𝜓))
3		moanimv 2623	. . . . 5 ⊢ (∃*𝑧(𝜑 ∧ 𝜓) ↔ (𝜑 → ∃*𝑧𝜓))
4	2, 3	sylibr 235	. . . 4 ⊢ ((𝜑 → ∃!𝑧𝜓) → ∃*𝑧(𝜑 ∧ 𝜓))
5	4	2alimi 1819	. . 3 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → ∀𝑥∀𝑦∃*𝑧(𝜑 ∧ 𝜓))
6		funoprabg 7477	. . 3 ⊢ (∀𝑥∀𝑦∃*𝑧(𝜑 ∧ 𝜓) → Fun {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)})
7	5, 6	syl 17	. 2 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → Fun {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)})
8		dmoprab 7459	. . 3 ⊢ dom {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧(𝜑 ∧ 𝜓)}
9		nfa1 2162	. . . 4 ⊢ Ⅎ𝑥∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓)
10		nfa2 2186	. . . 4 ⊢ Ⅎ𝑦∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓)
11		simpl 483	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
12	11	exlimiv 1937	. . . . . . 7 ⊢ (∃𝑧(𝜑 ∧ 𝜓) → 𝜑)
13		euex 2581	. . . . . . . . . 10 ⊢ (∃!𝑧𝜓 → ∃𝑧𝜓)
14	13	imim2i 16	. . . . . . . . 9 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → ∃𝑧𝜓))
15	14	ancld 555	. . . . . . . 8 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → (𝜑 ∧ ∃𝑧𝜓)))
16		19.42v 1960	. . . . . . . 8 ⊢ (∃𝑧(𝜑 ∧ 𝜓) ↔ (𝜑 ∧ ∃𝑧𝜓))
17	15, 16	imbitrrdi 253	. . . . . . 7 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → ∃𝑧(𝜑 ∧ 𝜓)))
18	12, 17	impbid2 227	. . . . . 6 ⊢ ((𝜑 → ∃!𝑧𝜓) → (∃𝑧(𝜑 ∧ 𝜓) ↔ 𝜑))
19	18	sps 2197	. . . . 5 ⊢ (∀𝑦(𝜑 → ∃!𝑧𝜓) → (∃𝑧(𝜑 ∧ 𝜓) ↔ 𝜑))
20	19	sps 2197	. . . 4 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → (∃𝑧(𝜑 ∧ 𝜓) ↔ 𝜑))
21	9, 10, 20	opabbid 5137	. . 3 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → {⟨𝑥, 𝑦⟩ ∣ ∃𝑧(𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ 𝜑})
22	8, 21	eqtrid 2786	. 2 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → dom {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ 𝜑})
23		df-fn 6488	. 2 ⊢ ({⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} Fn {⟨𝑥, 𝑦⟩ ∣ 𝜑} ↔ (Fun {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} ∧ dom {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ 𝜑}))
24	7, 22, 23	sylanbrc 589	1 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} Fn {⟨𝑥, 𝑦⟩ ∣ 𝜑})

Syntax hints:   → wi 4   ↔ wb 207   ∧ wa 396  ∀wal 1545   = wceq 1547  ∃wex 1786  ∃*wmo 2541  ∃!weu 2572  {copab 5134  dom cdm 5618  Fun wfun 6479   Fn wfn 6480  {coprab 7357

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-sep 5218  ax-pr 5362

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ral 3054  df-rex 3064  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4262  df-if 4455  df-sn 4556  df-pr 4558  df-op 4562  df-br 5073  df-opab 5135  df-id 5513  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-fun 6487  df-fn 6488  df-oprab 7360

This theorem is referenced by:  fnoprab  7481  ovg  7521