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Theorem pclcmpatN 36904
Description: The set of projective subspaces is compactly atomistic: if an atom is in the projective subspace closure of a set of atoms, it also belongs to the projective subspace closure of a finite subset of that set. Analogous to Lemma 3.3.10 of [PtakPulmannova] p. 74. (Contributed by NM, 10-Sep-2013.) (New usage is discouraged.)
Hypotheses
Ref Expression
pclfin.a 𝐴 = (Atoms‘𝐾)
pclfin.c 𝑈 = (PCl‘𝐾)
Assertion
Ref Expression
pclcmpatN ((𝐾 ∈ AtLat ∧ 𝑋𝐴𝑃 ∈ (𝑈𝑋)) → ∃𝑦 ∈ Fin (𝑦𝑋𝑃 ∈ (𝑈𝑦)))
Distinct variable groups:   𝑦,𝐴   𝑦,𝑈   𝑦,𝐾   𝑦,𝑋   𝑦,𝑃

Proof of Theorem pclcmpatN
StepHypRef Expression
1 pclfin.a . . . . . 6 𝐴 = (Atoms‘𝐾)
2 pclfin.c . . . . . 6 𝑈 = (PCl‘𝐾)
31, 2pclfinN 36903 . . . . 5 ((𝐾 ∈ AtLat ∧ 𝑋𝐴) → (𝑈𝑋) = 𝑦 ∈ (Fin ∩ 𝒫 𝑋)(𝑈𝑦))
43eleq2d 2903 . . . 4 ((𝐾 ∈ AtLat ∧ 𝑋𝐴) → (𝑃 ∈ (𝑈𝑋) ↔ 𝑃 𝑦 ∈ (Fin ∩ 𝒫 𝑋)(𝑈𝑦)))
5 eliun 4921 . . . 4 (𝑃 𝑦 ∈ (Fin ∩ 𝒫 𝑋)(𝑈𝑦) ↔ ∃𝑦 ∈ (Fin ∩ 𝒫 𝑋)𝑃 ∈ (𝑈𝑦))
64, 5syl6bb 288 . . 3 ((𝐾 ∈ AtLat ∧ 𝑋𝐴) → (𝑃 ∈ (𝑈𝑋) ↔ ∃𝑦 ∈ (Fin ∩ 𝒫 𝑋)𝑃 ∈ (𝑈𝑦)))
7 elin 4173 . . . . . . 7 (𝑦 ∈ (Fin ∩ 𝒫 𝑋) ↔ (𝑦 ∈ Fin ∧ 𝑦 ∈ 𝒫 𝑋))
8 elpwi 4554 . . . . . . . 8 (𝑦 ∈ 𝒫 𝑋𝑦𝑋)
98anim2i 616 . . . . . . 7 ((𝑦 ∈ Fin ∧ 𝑦 ∈ 𝒫 𝑋) → (𝑦 ∈ Fin ∧ 𝑦𝑋))
107, 9sylbi 218 . . . . . 6 (𝑦 ∈ (Fin ∩ 𝒫 𝑋) → (𝑦 ∈ Fin ∧ 𝑦𝑋))
1110anim1i 614 . . . . 5 ((𝑦 ∈ (Fin ∩ 𝒫 𝑋) ∧ 𝑃 ∈ (𝑈𝑦)) → ((𝑦 ∈ Fin ∧ 𝑦𝑋) ∧ 𝑃 ∈ (𝑈𝑦)))
12 anass 469 . . . . 5 (((𝑦 ∈ Fin ∧ 𝑦𝑋) ∧ 𝑃 ∈ (𝑈𝑦)) ↔ (𝑦 ∈ Fin ∧ (𝑦𝑋𝑃 ∈ (𝑈𝑦))))
1311, 12sylib 219 . . . 4 ((𝑦 ∈ (Fin ∩ 𝒫 𝑋) ∧ 𝑃 ∈ (𝑈𝑦)) → (𝑦 ∈ Fin ∧ (𝑦𝑋𝑃 ∈ (𝑈𝑦))))
1413reximi2 3249 . . 3 (∃𝑦 ∈ (Fin ∩ 𝒫 𝑋)𝑃 ∈ (𝑈𝑦) → ∃𝑦 ∈ Fin (𝑦𝑋𝑃 ∈ (𝑈𝑦)))
156, 14syl6bi 254 . 2 ((𝐾 ∈ AtLat ∧ 𝑋𝐴) → (𝑃 ∈ (𝑈𝑋) → ∃𝑦 ∈ Fin (𝑦𝑋𝑃 ∈ (𝑈𝑦))))
16153impia 1111 1 ((𝐾 ∈ AtLat ∧ 𝑋𝐴𝑃 ∈ (𝑈𝑋)) → ∃𝑦 ∈ Fin (𝑦𝑋𝑃 ∈ (𝑈𝑦)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396  w3a 1081   = wceq 1530  wcel 2107  wrex 3144  cin 3939  wss 3940  𝒫 cpw 4542   ciun 4917  cfv 6352  Fincfn 8498  Atomscatm 36266  AtLatcal 36267  PClcpclN 36890
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-13 2385  ax-ext 2798  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5326  ax-un 7451
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2620  df-eu 2652  df-clab 2805  df-cleq 2819  df-clel 2898  df-nfc 2968  df-ne 3022  df-ral 3148  df-rex 3149  df-reu 3150  df-rab 3152  df-v 3502  df-sbc 3777  df-csb 3888  df-dif 3943  df-un 3945  df-in 3947  df-ss 3956  df-pss 3958  df-nul 4296  df-if 4471  df-pw 4544  df-sn 4565  df-pr 4567  df-tp 4569  df-op 4571  df-uni 4838  df-int 4875  df-iun 4919  df-br 5064  df-opab 5126  df-mpt 5144  df-tr 5170  df-id 5459  df-eprel 5464  df-po 5473  df-so 5474  df-fr 5513  df-we 5515  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-pred 6146  df-ord 6192  df-on 6193  df-lim 6194  df-suc 6195  df-iota 6312  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-riota 7106  df-ov 7151  df-oprab 7152  df-mpo 7153  df-om 7569  df-wrecs 7938  df-recs 7999  df-rdg 8037  df-1o 8093  df-oadd 8097  df-er 8279  df-en 8499  df-fin 8502  df-proset 17528  df-poset 17546  df-plt 17558  df-lub 17574  df-glb 17575  df-join 17576  df-meet 17577  df-p0 17639  df-lat 17646  df-covers 36269  df-ats 36270  df-atl 36301  df-psubsp 36506  df-pclN 36891
This theorem is referenced by: (None)
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