Theorem fnoprabg 7481

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 2578	. . . . . 6 ⊢ (∃!𝑧𝜓 → ∃*𝑧𝜓)
2	1	imim2i 16	. . . . 5 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → ∃*𝑧𝜓))
3		moanimv 2619	. . . . 5 ⊢ (∃*𝑧(𝜑 ∧ 𝜓) ↔ (𝜑 → ∃*𝑧𝜓))
4	2, 3	sylibr 234	. . . 4 ⊢ ((𝜑 → ∃!𝑧𝜓) → ∃*𝑧(𝜑 ∧ 𝜓))
5	4	2alimi 1813	. . 3 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → ∀𝑥∀𝑦∃*𝑧(𝜑 ∧ 𝜓))
6		funoprabg 7479	. . 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 7461	. . 3 ⊢ dom {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧(𝜑 ∧ 𝜓)}
9		nfa1 2156	. . . 4 ⊢ Ⅎ𝑥∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓)
10		nfa2 2181	. . . 4 ⊢ Ⅎ𝑦∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓)
11		simpl 482	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
12	11	exlimiv 1931	. . . . . . 7 ⊢ (∃𝑧(𝜑 ∧ 𝜓) → 𝜑)
13		euex 2577	. . . . . . . . . 10 ⊢ (∃!𝑧𝜓 → ∃𝑧𝜓)
14	13	imim2i 16	. . . . . . . . 9 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → ∃𝑧𝜓))
15	14	ancld 550	. . . . . . . 8 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → (𝜑 ∧ ∃𝑧𝜓)))
16		19.42v 1954	. . . . . . . 8 ⊢ (∃𝑧(𝜑 ∧ 𝜓) ↔ (𝜑 ∧ ∃𝑧𝜓))
17	15, 16	imbitrrdi 252	. . . . . . 7 ⊢ ((𝜑 → ∃!𝑧𝜓) → (𝜑 → ∃𝑧(𝜑 ∧ 𝜓)))
18	12, 17	impbid2 226	. . . . . 6 ⊢ ((𝜑 → ∃!𝑧𝜓) → (∃𝑧(𝜑 ∧ 𝜓) ↔ 𝜑))
19	18	sps 2192	. . . . 5 ⊢ (∀𝑦(𝜑 → ∃!𝑧𝜓) → (∃𝑧(𝜑 ∧ 𝜓) ↔ 𝜑))
20	19	sps 2192	. . . 4 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → (∃𝑧(𝜑 ∧ 𝜓) ↔ 𝜑))
21	9, 10, 20	opabbid 5163	. . 3 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → {⟨𝑥, 𝑦⟩ ∣ ∃𝑧(𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ 𝜑})
22	8, 21	eqtrid 2783	. 2 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → dom {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} = {⟨𝑥, 𝑦⟩ ∣ 𝜑})
23		df-fn 6495	. 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 583	1 ⊢ (∀𝑥∀𝑦(𝜑 → ∃!𝑧𝜓) → {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ (𝜑 ∧ 𝜓)} Fn {⟨𝑥, 𝑦⟩ ∣ 𝜑})

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395  ∀wal 1539   = wceq 1541  ∃wex 1780  ∃*wmo 2537  ∃!weu 2568  {copab 5160  dom cdm 5624  Fun wfun 6486   Fn wfn 6487  {coprab 7359

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pr 5377

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-dif 3904  df-un 3906  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-br 5099  df-opab 5161  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-fun 6494  df-fn 6495  df-oprab 7362

This theorem is referenced by:  fnoprab  7483  ovg  7523