Theorem kmlem10 9915

Description: Lemma for 5-quantifier AC of Kurt Maes, Th. 4, part of 3 => 4. (Contributed by NM, 25-Mar-2004.)

Hypothesis

Ref	Expression
kmlem9.1	⊢ 𝐴 = {𝑢 ∣ ∃𝑡 ∈ 𝑥 𝑢 = (𝑡 ∖ ∪ (𝑥 ∖ {𝑡}))}

Assertion

Ref	Expression
kmlem10	⊢ (∀ℎ(∀𝑧 ∈ ℎ ∀𝑤 ∈ ℎ (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) → ∃𝑦∀𝑧 ∈ ℎ 𝜑) → ∃𝑦∀𝑧 ∈ 𝐴 𝜑)

Distinct variable groups:   𝑥,𝑦,𝑧,𝑤,𝑢,𝑡,ℎ   𝑦,𝐴,𝑧,𝑤,ℎ   𝜑,ℎ

Allowed substitution hints:   𝜑(𝑥,𝑦,𝑧,𝑤,𝑢,𝑡)   𝐴(𝑥,𝑢,𝑡)

Proof of Theorem kmlem10

Step	Hyp	Ref	Expression
1		kmlem9.1	. . 3 ⊢ 𝐴 = {𝑢 ∣ ∃𝑡 ∈ 𝑥 𝑢 = (𝑡 ∖ ∪ (𝑥 ∖ {𝑡}))}
2	1	kmlem9 9914	. 2 ⊢ ∀𝑧 ∈ 𝐴 ∀𝑤 ∈ 𝐴 (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅)
3		vex 3436	. . . . 5 ⊢ 𝑥 ∈ V
4	3	abrexex 7805	. . . 4 ⊢ {𝑢 ∣ ∃𝑡 ∈ 𝑥 𝑢 = (𝑡 ∖ ∪ (𝑥 ∖ {𝑡}))} ∈ V
5	1, 4	eqeltri 2835	. . 3 ⊢ 𝐴 ∈ V
6		raleq 3342	. . . . 5 ⊢ (ℎ = 𝐴 → (∀𝑤 ∈ ℎ (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) ↔ ∀𝑤 ∈ 𝐴 (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅)))
7	6	raleqbi1dv 3340	. . . 4 ⊢ (ℎ = 𝐴 → (∀𝑧 ∈ ℎ ∀𝑤 ∈ ℎ (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) ↔ ∀𝑧 ∈ 𝐴 ∀𝑤 ∈ 𝐴 (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅)))
8		raleq 3342	. . . . 5 ⊢ (ℎ = 𝐴 → (∀𝑧 ∈ ℎ 𝜑 ↔ ∀𝑧 ∈ 𝐴 𝜑))
9	8	exbidv 1924	. . . 4 ⊢ (ℎ = 𝐴 → (∃𝑦∀𝑧 ∈ ℎ 𝜑 ↔ ∃𝑦∀𝑧 ∈ 𝐴 𝜑))
10	7, 9	imbi12d 345	. . 3 ⊢ (ℎ = 𝐴 → ((∀𝑧 ∈ ℎ ∀𝑤 ∈ ℎ (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) → ∃𝑦∀𝑧 ∈ ℎ 𝜑) ↔ (∀𝑧 ∈ 𝐴 ∀𝑤 ∈ 𝐴 (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) → ∃𝑦∀𝑧 ∈ 𝐴 𝜑)))
11	5, 10	spcv 3544	. 2 ⊢ (∀ℎ(∀𝑧 ∈ ℎ ∀𝑤 ∈ ℎ (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) → ∃𝑦∀𝑧 ∈ ℎ 𝜑) → (∀𝑧 ∈ 𝐴 ∀𝑤 ∈ 𝐴 (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) → ∃𝑦∀𝑧 ∈ 𝐴 𝜑))
12	2, 11	mpi 20	1 ⊢ (∀ℎ(∀𝑧 ∈ ℎ ∀𝑤 ∈ ℎ (𝑧 ≠ 𝑤 → (𝑧 ∩ 𝑤) = ∅) → ∃𝑦∀𝑧 ∈ ℎ 𝜑) → ∃𝑦∀𝑧 ∈ 𝐴 𝜑)

Syntax hints:   → wi 4  ∀wal 1537   = wceq 1539  ∃wex 1782  {cab 2715   ≠ wne 2943  ∀wral 3064  ∃wrex 3065  Vcvv 3432   ∖ cdif 3884   ∩ cin 3886  ∅c0 4256  {csn 4561  ∪ cuni 4839

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709  ax-rep 5209

This theorem depends on definitions:  df-bi 206  df-an 397  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-mo 2540  df-clab 2716  df-cleq 2730  df-clel 2816  df-ne 2944  df-ral 3069  df-rex 3070  df-rab 3073  df-v 3434  df-dif 3890  df-in 3894  df-ss 3904  df-nul 4257  df-sn 4562  df-uni 4840

This theorem is referenced by:  kmlem13  9918