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Theorem cmpcov2 21415
Description: Rewrite cmpcov 21414 for the cover {𝑦𝐽𝜑}. (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 3742 . . . . 5 (𝑋 {𝑦𝐽𝜑} ↔ ∀𝑥𝑋 𝑥 {𝑦𝐽𝜑})
2 elunirab 4587 . . . . . 6 (𝑥 {𝑦𝐽𝜑} ↔ ∃𝑦𝐽 (𝑥𝑦𝜑))
32ralbii 3129 . . . . 5 (∀𝑥𝑋 𝑥 {𝑦𝐽𝜑} ↔ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑))
41, 3sylbbr 226 . . . 4 (∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑) → 𝑋 {𝑦𝐽𝜑})
5 ssrab2 3837 . . . . . . 7 {𝑦𝐽𝜑} ⊆ 𝐽
65unissi 4598 . . . . . 6 {𝑦𝐽𝜑} ⊆ 𝐽
7 iscmp.1 . . . . . 6 𝑋 = 𝐽
86, 7sseqtr4i 3788 . . . . 5 {𝑦𝐽𝜑} ⊆ 𝑋
98a1i 11 . . . 4 (∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑) → {𝑦𝐽𝜑} ⊆ 𝑋)
104, 9eqssd 3770 . . 3 (∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑) → 𝑋 = {𝑦𝐽𝜑})
117cmpcov 21414 . . . 4 ((𝐽 ∈ Comp ∧ {𝑦𝐽𝜑} ⊆ 𝐽𝑋 = {𝑦𝐽𝜑}) → ∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠)
125, 11mp3an2 1560 . . 3 ((𝐽 ∈ Comp ∧ 𝑋 = {𝑦𝐽𝜑}) → ∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠)
1310, 12sylan2 574 . 2 ((𝐽 ∈ Comp ∧ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑)) → ∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠)
14 ssrab 3830 . . . . . . . 8 (𝑠 ⊆ {𝑦𝐽𝜑} ↔ (𝑠𝐽 ∧ ∀𝑦𝑠 𝜑))
1514anbi1i 604 . . . . . . 7 ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ↔ ((𝑠𝐽 ∧ ∀𝑦𝑠 𝜑) ∧ 𝑋 = 𝑠))
16 an32 619 . . . . . . 7 (((𝑠𝐽 ∧ ∀𝑦𝑠 𝜑) ∧ 𝑋 = 𝑠) ↔ ((𝑠𝐽𝑋 = 𝑠) ∧ ∀𝑦𝑠 𝜑))
17 anass 459 . . . . . . 7 (((𝑠𝐽𝑋 = 𝑠) ∧ ∀𝑦𝑠 𝜑) ↔ (𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
1815, 16, 173bitri 286 . . . . . 6 ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ↔ (𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
1918anbi1i 604 . . . . 5 (((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ∧ 𝑠 ∈ Fin) ↔ ((𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ∧ 𝑠 ∈ Fin))
20 an32 619 . . . . 5 (((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin) ∧ 𝑋 = 𝑠) ↔ ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑋 = 𝑠) ∧ 𝑠 ∈ Fin))
21 an32 619 . . . . 5 (((𝑠𝐽𝑠 ∈ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ↔ ((𝑠𝐽 ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ∧ 𝑠 ∈ Fin))
2219, 20, 213bitr4i 292 . . . 4 (((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin) ∧ 𝑋 = 𝑠) ↔ ((𝑠𝐽𝑠 ∈ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
23 elfpw 8425 . . . . 5 (𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin) ↔ (𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin))
2423anbi1i 604 . . . 4 ((𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin) ∧ 𝑋 = 𝑠) ↔ ((𝑠 ⊆ {𝑦𝐽𝜑} ∧ 𝑠 ∈ Fin) ∧ 𝑋 = 𝑠))
25 elfpw 8425 . . . . 5 (𝑠 ∈ (𝒫 𝐽 ∩ Fin) ↔ (𝑠𝐽𝑠 ∈ Fin))
2625anbi1i 604 . . . 4 ((𝑠 ∈ (𝒫 𝐽 ∩ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)) ↔ ((𝑠𝐽𝑠 ∈ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
2722, 24, 263bitr4i 292 . . 3 ((𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin) ∧ 𝑋 = 𝑠) ↔ (𝑠 ∈ (𝒫 𝐽 ∩ Fin) ∧ (𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑)))
2827rexbii2 3187 . 2 (∃𝑠 ∈ (𝒫 {𝑦𝐽𝜑} ∩ Fin)𝑋 = 𝑠 ↔ ∃𝑠 ∈ (𝒫 𝐽 ∩ Fin)(𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑))
2913, 28sylib 208 1 ((𝐽 ∈ Comp ∧ ∀𝑥𝑋𝑦𝐽 (𝑥𝑦𝜑)) → ∃𝑠 ∈ (𝒫 𝐽 ∩ Fin)(𝑋 = 𝑠 ∧ ∀𝑦𝑠 𝜑))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 382   = wceq 1631  wcel 2145  wral 3061  wrex 3062  {crab 3065  cin 3723  wss 3724  𝒫 cpw 4298   cuni 4575  Fincfn 8110  Compccmp 21411
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1870  ax-4 1885  ax-5 1991  ax-6 2057  ax-7 2093  ax-9 2154  ax-10 2174  ax-11 2190  ax-12 2203  ax-13 2408  ax-ext 2751  ax-sep 4916
This theorem depends on definitions:  df-bi 197  df-an 383  df-or 829  df-3an 1073  df-tru 1634  df-ex 1853  df-nf 1858  df-sb 2050  df-clab 2758  df-cleq 2764  df-clel 2767  df-nfc 2902  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3353  df-in 3731  df-ss 3738  df-pw 4300  df-uni 4576  df-cmp 21412
This theorem is referenced by:  cmpcovf  21416  bwth  21435  locfincmp  21551
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