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Theorem cmpcov2 21998
 Description: Rewrite cmpcov 21997 for the cover {𝑦 ∈ 𝐽 ∣ 𝜑}. (Contributed by Mario Carneiro, 11-Sep-2015.)
Hypothesis
Ref Expression
iscmp.1 𝑋 = 𝐽
Assertion
Ref Expression
cmpcov2 ((𝐽 ∈ Comp ∧ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑)) → ∃𝑠 ∈ (𝒫 𝐽 ∩ Fin)(𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑))
Distinct variable groups:   𝑥,𝑠,𝑦,𝐽   𝜑,𝑠,𝑥   𝑥,𝑋
Allowed substitution hints:   𝜑(𝑦)   𝑋(𝑦,𝑠)

Proof of Theorem cmpcov2
StepHypRef Expression
1 dfss3 3941 . . . . 5 (𝑋 {𝑦𝐽𝜑} ↔ ∀𝑥𝑋 𝑥 {𝑦𝐽𝜑})
2 elunirab 4840 . . . . . 6 (𝑥 {𝑦𝐽𝜑} ↔ ∃𝑦𝐽 (𝑥𝑦𝜑))
32ralbii 3160 . . . . 5 (∀𝑥𝑋 𝑥 {𝑦𝐽𝜑} ↔ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑))
41, 3sylbbr 239 . . . 4 (∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑) → 𝑋 {𝑦𝐽𝜑})
5 ssrab2 4042 . . . . . . 7 {𝑦𝐽𝜑} ⊆ 𝐽
65unissi 4833 . . . . . 6 {𝑦𝐽𝜑} ⊆ 𝐽
7 iscmp.1 . . . . . 6 𝑋 = 𝐽
86, 7sseqtrri 3990 . . . . 5 {𝑦𝐽𝜑} ⊆ 𝑋
98a1i 11 . . . 4 (∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑) → {𝑦𝐽𝜑} ⊆ 𝑋)
104, 9eqssd 3970 . . 3 (∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑) → 𝑋 = {𝑦𝐽𝜑})
117cmpcov 21997 . . . 4 ((𝐽 ∈ Comp ∧ {𝑦𝐽𝜑} ⊆ 𝐽𝑋 = {𝑦𝐽𝜑}) → ∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠)
125, 11mp3an2 1446 . . 3 ((𝐽 ∈ Comp ∧ 𝑋 = {𝑦𝐽𝜑}) → ∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠)
1310, 12sylan2 595 . 2 ((𝐽 ∈ Comp ∧ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑)) → ∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠)
14 ssrab 4035 . . . . . . . 8 (𝑠 ⊆ {𝑦𝐽𝜑} ↔ (𝑠𝐽 ∧ ∀𝑦𝑠 𝜑))
1514anbi1i 626 . . . . . . 7 ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ↔ ((𝑠𝐽 ∧ ∀𝑦𝑠 𝜑) ∧ 𝑋 = 𝑠))
16 an32 645 . . . . . . 7 (((𝑠𝐽 ∧ ∀𝑦𝑠 𝜑) ∧ 𝑋 = 𝑠) ↔ ((𝑠𝐽𝑋 = 𝑠) ∧ ∀𝑦𝑠 𝜑))
17 anass 472 . . . . . . 7 (((𝑠𝐽𝑋 = 𝑠) ∧ ∀𝑦𝑠 𝜑) ↔ (𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
1815, 16, 173bitri 300 . . . . . 6 ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ↔ (𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
1918anbi1i 626 . . . . 5 (((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ∧ 𝑠 ∈ Fin) ↔ ((𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ∧ 𝑠 ∈ Fin))
20 an32 645 . . . . 5 (((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin) ∧ 𝑋 = 𝑠) ↔ ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ∧ 𝑠 ∈ Fin))
21 an32 645 . . . . 5 (((𝑠𝐽𝑠 ∈ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ↔ ((𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ∧ 𝑠 ∈ Fin))
2219, 20, 213bitr4i 306 . . . 4 (((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin) ∧ 𝑋 = 𝑠) ↔ ((𝑠𝐽𝑠 ∈ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
23 elfpw 8823 . . . . 5 (𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin) ↔ (𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin))
2423anbi1i 626 . . . 4 ((𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin) ∧ 𝑋 = 𝑠) ↔ ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin) ∧ 𝑋 = 𝑠))
25 elfpw 8823 . . . . 5 (𝑠 ∈ (𝒫 𝐽 ∩ Fin) ↔ (𝑠𝐽𝑠 ∈ Fin))
2625anbi1i 626 . . . 4 ((𝑠 ∈ (𝒫 𝐽 ∩ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ↔ ((𝑠𝐽𝑠 ∈ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
2722, 24, 263bitr4i 306 . . 3 ((𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin) ∧ 𝑋 = 𝑠) ↔ (𝑠 ∈ (𝒫 𝐽 ∩ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
2827rexbii2 3239 . 2 (∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠 ↔ ∃𝑠 ∈ (𝒫 𝐽 ∩ Fin)(𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑))
2913, 28sylib 221 1 ((𝐽 ∈ Comp ∧ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑)) → ∃𝑠 ∈ (𝒫 𝐽 ∩ Fin)(𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 399   = wceq 1538   ∈ wcel 2115  ∀wral 3133  ∃wrex 3134  {crab 3137   ∩ cin 3918   ⊆ wss 3919  𝒫 cpw 4522  ∪ cuni 4824  Fincfn 8505  Compccmp 21994 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 1912  ax-6 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2179  ax-ext 2796  ax-sep 5189 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2071  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2964  df-ral 3138  df-rex 3139  df-rab 3142  df-v 3482  df-in 3926  df-ss 3936  df-pw 4524  df-uni 4825  df-cmp 21995 This theorem is referenced by:  cmpcovf  21999  bwth  22018  locfincmp  22134
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