Theorem neipeltop 22026

Description: Lemma for neiptopreu 22030. (Contributed by Thierry Arnoux, 6-Jan-2018.)

Hypothesis

Ref	Expression
neiptop.o	⊢ 𝐽 = {𝑎 ∈ 𝒫 𝑋 ∣ ∀𝑝 ∈ 𝑎 𝑎 ∈ (𝑁‘𝑝)}

Assertion

Ref	Expression
neipeltop	⊢ (𝐶 ∈ 𝐽 ↔ (𝐶 ⊆ 𝑋 ∧ ∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝)))

Distinct variable groups:   𝑝,𝑎,𝐶   𝑁,𝑎   𝑋,𝑎

Allowed substitution hints:   𝐽(𝑝,𝑎)   𝑁(𝑝)   𝑋(𝑝)

Proof of Theorem neipeltop

Step	Hyp	Ref	Expression
1		eleq1 2825	. . . 4 ⊢ (𝑎 = 𝐶 → (𝑎 ∈ (𝑁‘𝑝) ↔ 𝐶 ∈ (𝑁‘𝑝)))
2	1	raleqbi1dv 3317	. . 3 ⊢ (𝑎 = 𝐶 → (∀𝑝 ∈ 𝑎 𝑎 ∈ (𝑁‘𝑝) ↔ ∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝)))
3		neiptop.o	. . 3 ⊢ 𝐽 = {𝑎 ∈ 𝒫 𝑋 ∣ ∀𝑝 ∈ 𝑎 𝑎 ∈ (𝑁‘𝑝)}
4	2, 3	elrab2 3605	. 2 ⊢ (𝐶 ∈ 𝐽 ↔ (𝐶 ∈ 𝒫 𝑋 ∧ ∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝)))
5		0ex 5200	. . . . . . 7 ⊢ ∅ ∈ V
6		eleq1 2825	. . . . . . 7 ⊢ (𝐶 = ∅ → (𝐶 ∈ V ↔ ∅ ∈ V))
7	5, 6	mpbiri 261	. . . . . 6 ⊢ (𝐶 = ∅ → 𝐶 ∈ V)
8	7	adantl 485	. . . . 5 ⊢ ((∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝) ∧ 𝐶 = ∅) → 𝐶 ∈ V)
9		elex 3426	. . . . . . 7 ⊢ (𝐶 ∈ (𝑁‘𝑝) → 𝐶 ∈ V)
10	9	ralimi 3083	. . . . . 6 ⊢ (∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝) → ∀𝑝 ∈ 𝐶 𝐶 ∈ V)
11		r19.3rzv 4410	. . . . . . 7 ⊢ (𝐶 ≠ ∅ → (𝐶 ∈ V ↔ ∀𝑝 ∈ 𝐶 𝐶 ∈ V))
12	11	biimparc 483	. . . . . 6 ⊢ ((∀𝑝 ∈ 𝐶 𝐶 ∈ V ∧ 𝐶 ≠ ∅) → 𝐶 ∈ V)
13	10, 12	sylan 583	. . . . 5 ⊢ ((∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝) ∧ 𝐶 ≠ ∅) → 𝐶 ∈ V)
14	8, 13	pm2.61dane 3029	. . . 4 ⊢ (∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝) → 𝐶 ∈ V)
15		elpwg 4516	. . . 4 ⊢ (𝐶 ∈ V → (𝐶 ∈ 𝒫 𝑋 ↔ 𝐶 ⊆ 𝑋))
16	14, 15	syl 17	. . 3 ⊢ (∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝) → (𝐶 ∈ 𝒫 𝑋 ↔ 𝐶 ⊆ 𝑋))
17	16	pm5.32ri 579	. 2 ⊢ ((𝐶 ∈ 𝒫 𝑋 ∧ ∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝)) ↔ (𝐶 ⊆ 𝑋 ∧ ∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝)))
18	4, 17	bitri 278	1 ⊢ (𝐶 ∈ 𝐽 ↔ (𝐶 ⊆ 𝑋 ∧ ∀𝑝 ∈ 𝐶 𝐶 ∈ (𝑁‘𝑝)))

Syntax hints:   ↔ wb 209   ∧ wa 399   = wceq 1543   ∈ wcel 2110   ≠ wne 2940  ∀wral 3061  {crab 3065  Vcvv 3408   ⊆ wss 3866  ∅c0 4237  𝒫 cpw 4513  ‘cfv 6380

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2112  ax-9 2120  ax-12 2175  ax-ext 2708  ax-nul 5199

This theorem depends on definitions:  df-bi 210  df-an 400  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2071  df-clab 2715  df-cleq 2729  df-clel 2816  df-ne 2941  df-ral 3066  df-rab 3070  df-v 3410  df-dif 3869  df-in 3873  df-ss 3883  df-nul 4238  df-pw 4515

This theorem is referenced by:  neiptopuni  22027  neiptoptop  22028  neiptopnei  22029  neiptopreu  22030