Theorem bnj865 33929

Description: Technical lemma for bnj69 34016. This lemma may no longer be used or have become an indirect lemma of the theorem in question (i.e. a lemma of a lemma... of the theorem). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
bnj865.1	⊢ (𝜑 ↔ (𝑓‘∅) = pred(𝑋, 𝐴, 𝑅))
bnj865.2	⊢ (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖 ∈ 𝑛 → (𝑓‘suc 𝑖) = ∪ 𝑦 ∈ (𝑓‘𝑖) pred(𝑦, 𝐴, 𝑅)))
bnj865.3	⊢ 𝐷 = (ω ∖ {∅})
bnj865.5	⊢ (𝜒 ↔ (𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷))
bnj865.6	⊢ (𝜃 ↔ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))

Assertion

Ref	Expression
bnj865	⊢ ∃𝑤∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 𝜃)

Distinct variable groups:   𝐴,𝑓,𝑖,𝑛,𝑦   𝑤,𝐴,𝑓,𝑛   𝐷,𝑓,𝑖,𝑛   𝑤,𝐷   𝑅,𝑓,𝑖,𝑛,𝑦   𝑤,𝑅   𝑓,𝑋,𝑛,𝑤   𝜑,𝑤   𝜓,𝑤

Allowed substitution hints:   𝜑(𝑦,𝑓,𝑖,𝑛)   𝜓(𝑦,𝑓,𝑖,𝑛)   𝜒(𝑦,𝑤,𝑓,𝑖,𝑛)   𝜃(𝑦,𝑤,𝑓,𝑖,𝑛)   𝐷(𝑦)   𝑋(𝑦,𝑖)

Proof of Theorem bnj865

Dummy variable 𝑧 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		bnj865.1	. . . . . . 7 ⊢ (𝜑 ↔ (𝑓‘∅) = pred(𝑋, 𝐴, 𝑅))
2		bnj865.2	. . . . . . 7 ⊢ (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖 ∈ 𝑛 → (𝑓‘suc 𝑖) = ∪ 𝑦 ∈ (𝑓‘𝑖) pred(𝑦, 𝐴, 𝑅)))
3		bnj865.3	. . . . . . 7 ⊢ 𝐷 = (ω ∖ {∅})
4	1, 2, 3	bnj852 33927	. . . . . 6 ⊢ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
5		omex 9637	. . . . . . . . 9 ⊢ ω ∈ V
6		difexg 5327	. . . . . . . . 9 ⊢ (ω ∈ V → (ω ∖ {∅}) ∈ V)
7	5, 6	ax-mp 5	. . . . . . . 8 ⊢ (ω ∖ {∅}) ∈ V
8	3, 7	eqeltri 2829	. . . . . . 7 ⊢ 𝐷 ∈ V
9		raleq 3322	. . . . . . . 8 ⊢ (𝑧 = 𝐷 → (∀𝑛 ∈ 𝑧 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ↔ ∀𝑛 ∈ 𝐷 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
10		raleq 3322	. . . . . . . . 9 ⊢ (𝑧 = 𝐷 → (∀𝑛 ∈ 𝑧 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ↔ ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
11	10	exbidv 1924	. . . . . . . 8 ⊢ (𝑧 = 𝐷 → (∃𝑤∀𝑛 ∈ 𝑧 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ↔ ∃𝑤∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
12	9, 11	imbi12d 344	. . . . . . 7 ⊢ (𝑧 = 𝐷 → ((∀𝑛 ∈ 𝑧 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) → ∃𝑤∀𝑛 ∈ 𝑧 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ (∀𝑛 ∈ 𝐷 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) → ∃𝑤∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))))
13		zfrep6 7940	. . . . . . 7 ⊢ (∀𝑛 ∈ 𝑧 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) → ∃𝑤∀𝑛 ∈ 𝑧 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
14	8, 12, 13	vtocl 3549	. . . . . 6 ⊢ (∀𝑛 ∈ 𝐷 ∃!𝑓(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) → ∃𝑤∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
15	4, 14	syl 17	. . . . 5 ⊢ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∃𝑤∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
16		19.37v 1995	. . . . 5 ⊢ (∃𝑤((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∃𝑤∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
17	15, 16	mpbir 230	. . . 4 ⊢ ∃𝑤((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
18		df-ral 3062	. . . . . . . 8 ⊢ (∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ↔ ∀𝑛(𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
19	18	imbi2i 335	. . . . . . 7 ⊢ (((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛(𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))))
20		19.21v 1942	. . . . . . 7 ⊢ (∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛(𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))))
21	19, 20	bitr4i 277	. . . . . 6 ⊢ (((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))))
22	21	exbii 1850	. . . . 5 ⊢ (∃𝑤((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ∃𝑤∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))))
23		impexp 451	. . . . . . . 8 ⊢ ((((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))))
24		df-3an 1089	. . . . . . . . . 10 ⊢ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) ∧ 𝑛 ∈ 𝐷))
25	24	bicomi 223	. . . . . . . . 9 ⊢ (((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) ∧ 𝑛 ∈ 𝐷) ↔ (𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷))
26	25	imbi1i 349	. . . . . . . 8 ⊢ ((((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
27	23, 26	bitr3i 276	. . . . . . 7 ⊢ (((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))) ↔ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
28	27	albii 1821	. . . . . 6 ⊢ (∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))) ↔ ∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
29	28	exbii 1850	. . . . 5 ⊢ (∃𝑤∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → (𝑛 ∈ 𝐷 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))) ↔ ∃𝑤∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
30	22, 29	bitri 274	. . . 4 ⊢ (∃𝑤((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴) → ∀𝑛 ∈ 𝐷 ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ∃𝑤∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
31	17, 30	mpbi 229	. . 3 ⊢ ∃𝑤∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
32		bnj865.5	. . . . . . 7 ⊢ (𝜒 ↔ (𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷))
33	32	bicomi 223	. . . . . 6 ⊢ ((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) ↔ 𝜒)
34	33	imbi1i 349	. . . . 5 ⊢ (((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ (𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
35	34	albii 1821	. . . 4 ⊢ (∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
36	35	exbii 1850	. . 3 ⊢ (∃𝑤∀𝑛((𝑅 FrSe 𝐴 ∧ 𝑋 ∈ 𝐴 ∧ 𝑛 ∈ 𝐷) → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ↔ ∃𝑤∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
37	31, 36	mpbi 229	. 2 ⊢ ∃𝑤∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
38		bnj865.6	. . . . . 6 ⊢ (𝜃 ↔ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
39	38	rexbii 3094	. . . . 5 ⊢ (∃𝑓 ∈ 𝑤 𝜃 ↔ ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
40	39	imbi2i 335	. . . 4 ⊢ ((𝜒 → ∃𝑓 ∈ 𝑤 𝜃) ↔ (𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
41	40	albii 1821	. . 3 ⊢ (∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 𝜃) ↔ ∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
42	41	exbii 1850	. 2 ⊢ (∃𝑤∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 𝜃) ↔ ∃𝑤∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
43	37, 42	mpbir 230	1 ⊢ ∃𝑤∀𝑛(𝜒 → ∃𝑓 ∈ 𝑤 𝜃)

Syntax hints:   → wi 4   ↔ wb 205   ∧ wa 396   ∧ w3a 1087  ∀wal 1539   = wceq 1541  ∃wex 1781   ∈ wcel 2106  ∃!weu 2562  ∀wral 3061  ∃wrex 3070  Vcvv 3474   ∖ cdif 3945  ∅c0 4322  {csn 4628  ∪ ciun 4997  suc csuc 6366   Fn wfn 6538  ‘cfv 6543  ωcom 7854   predc-bnj14 33694   FrSe w-bnj15 33698

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-rep 5285  ax-sep 5299  ax-nul 5306  ax-pow 5363  ax-pr 5427  ax-un 7724  ax-reg 9586  ax-inf2 9635

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3or 1088  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-reu 3377  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-pss 3967  df-nul 4323  df-if 4529  df-pw 4604  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-tr 5266  df-id 5574  df-eprel 5580  df-po 5588  df-so 5589  df-fr 5631  df-we 5633  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-ord 6367  df-on 6368  df-lim 6369  df-suc 6370  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-om 7855  df-1o 8465  df-bnj17 33693  df-bnj14 33695  df-bnj13 33697  df-bnj15 33699

This theorem is referenced by:  bnj849  33931