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Theorem neipeltop 23152
Description: Lemma for neiptopreu 23156. (Contributed by Thierry Arnoux, 6-Jan-2018.)
Hypothesis
Ref Expression
neiptop.o 𝐽 = {𝑎 ∈ 𝒫 𝑋 ∣ ∀𝑝𝑎 𝑎 ∈ (𝑁𝑝)}
Assertion
Ref Expression
neipeltop (𝐶𝐽 ↔ (𝐶𝑋 ∧ ∀𝑝𝐶 𝐶 ∈ (𝑁𝑝)))
Distinct variable groups:   𝑝,𝑎,𝐶   𝑁,𝑎   𝑋,𝑎
Allowed substitution hints:   𝐽(𝑝,𝑎)   𝑁(𝑝)   𝑋(𝑝)

Proof of Theorem neipeltop
StepHypRef Expression
1 eleq1 2826 . . . 4 (𝑎 = 𝐶 → (𝑎 ∈ (𝑁𝑝) ↔ 𝐶 ∈ (𝑁𝑝)))
21raleqbi1dv 3335 . . 3 (𝑎 = 𝐶 → (∀𝑝𝑎 𝑎 ∈ (𝑁𝑝) ↔ ∀𝑝𝐶 𝐶 ∈ (𝑁𝑝)))
3 neiptop.o . . 3 𝐽 = {𝑎 ∈ 𝒫 𝑋 ∣ ∀𝑝𝑎 𝑎 ∈ (𝑁𝑝)}
42, 3elrab2 3697 . 2 (𝐶𝐽 ↔ (𝐶 ∈ 𝒫 𝑋 ∧ ∀𝑝𝐶 𝐶 ∈ (𝑁𝑝)))
5 0ex 5312 . . . . . . 7 ∅ ∈ V
6 eleq1 2826 . . . . . . 7 (𝐶 = ∅ → (𝐶 ∈ V ↔ ∅ ∈ V))
75, 6mpbiri 258 . . . . . 6 (𝐶 = ∅ → 𝐶 ∈ V)
87adantl 481 . . . . 5 ((∀𝑝𝐶 𝐶 ∈ (𝑁𝑝) ∧ 𝐶 = ∅) → 𝐶 ∈ V)
9 elex 3498 . . . . . . 7 (𝐶 ∈ (𝑁𝑝) → 𝐶 ∈ V)
109ralimi 3080 . . . . . 6 (∀𝑝𝐶 𝐶 ∈ (𝑁𝑝) → ∀𝑝𝐶 𝐶 ∈ V)
11 r19.3rzv 4504 . . . . . . 7 (𝐶 ≠ ∅ → (𝐶 ∈ V ↔ ∀𝑝𝐶 𝐶 ∈ V))
1211biimparc 479 . . . . . 6 ((∀𝑝𝐶 𝐶 ∈ V ∧ 𝐶 ≠ ∅) → 𝐶 ∈ V)
1310, 12sylan 580 . . . . 5 ((∀𝑝𝐶 𝐶 ∈ (𝑁𝑝) ∧ 𝐶 ≠ ∅) → 𝐶 ∈ V)
148, 13pm2.61dane 3026 . . . 4 (∀𝑝𝐶 𝐶 ∈ (𝑁𝑝) → 𝐶 ∈ V)
15 elpwg 4607 . . . 4 (𝐶 ∈ V → (𝐶 ∈ 𝒫 𝑋𝐶𝑋))
1614, 15syl 17 . . 3 (∀𝑝𝐶 𝐶 ∈ (𝑁𝑝) → (𝐶 ∈ 𝒫 𝑋𝐶𝑋))
1716pm5.32ri 575 . 2 ((𝐶 ∈ 𝒫 𝑋 ∧ ∀𝑝𝐶 𝐶 ∈ (𝑁𝑝)) ↔ (𝐶𝑋 ∧ ∀𝑝𝐶 𝐶 ∈ (𝑁𝑝)))
184, 17bitri 275 1 (𝐶𝐽 ↔ (𝐶𝑋 ∧ ∀𝑝𝐶 𝐶 ∈ (𝑁𝑝)))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395   = wceq 1536  wcel 2105  wne 2937  wral 3058  {crab 3432  Vcvv 3477  wss 3962  c0 4338  𝒫 cpw 4604  cfv 6562
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1791  ax-4 1805  ax-5 1907  ax-6 1964  ax-7 2004  ax-8 2107  ax-9 2115  ax-12 2174  ax-ext 2705  ax-nul 5311
This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1539  df-fal 1549  df-ex 1776  df-nf 1780  df-sb 2062  df-clab 2712  df-cleq 2726  df-clel 2813  df-ne 2938  df-ral 3059  df-rex 3068  df-rab 3433  df-v 3479  df-dif 3965  df-ss 3979  df-nul 4339  df-pw 4606
This theorem is referenced by:  neiptopuni  23153  neiptoptop  23154  neiptopnei  23155  neiptopreu  23156
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