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Theorem pclcmpatN 30383
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  e.  AtLat  /\  X  C_  A  /\  P  e.  ( U `  X
) )  ->  E. y  e.  Fin  ( y  C_  X  /\  P  e.  ( U `  y ) ) )
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 30382 . . . . 5  |-  ( ( K  e.  AtLat  /\  X  C_  A )  ->  ( U `  X )  =  U_ y  e.  ( Fin  i^i  ~P X
) ( U `  y ) )
43eleq2d 2471 . . . 4  |-  ( ( K  e.  AtLat  /\  X  C_  A )  ->  ( P  e.  ( U `  X )  <->  P  e.  U_ y  e.  ( Fin 
i^i  ~P X ) ( U `  y ) ) )
5 eliun 4057 . . . 4  |-  ( P  e.  U_ y  e.  ( Fin  i^i  ~P X ) ( U `
 y )  <->  E. y  e.  ( Fin  i^i  ~P X ) P  e.  ( U `  y
) )
64, 5syl6bb 253 . . 3  |-  ( ( K  e.  AtLat  /\  X  C_  A )  ->  ( P  e.  ( U `  X )  <->  E. y  e.  ( Fin  i^i  ~P X ) P  e.  ( U `  y
) ) )
7 elin 3490 . . . . . . 7  |-  ( y  e.  ( Fin  i^i  ~P X )  <->  ( y  e.  Fin  /\  y  e. 
~P X ) )
8 elpwi 3767 . . . . . . . 8  |-  ( y  e.  ~P X  -> 
y  C_  X )
98anim2i 553 . . . . . . 7  |-  ( ( y  e.  Fin  /\  y  e.  ~P X
)  ->  ( y  e.  Fin  /\  y  C_  X ) )
107, 9sylbi 188 . . . . . 6  |-  ( y  e.  ( Fin  i^i  ~P X )  ->  (
y  e.  Fin  /\  y  C_  X ) )
1110anim1i 552 . . . . 5  |-  ( ( y  e.  ( Fin 
i^i  ~P X )  /\  P  e.  ( U `  y ) )  -> 
( ( y  e. 
Fin  /\  y  C_  X )  /\  P  e.  ( U `  y
) ) )
12 anass 631 . . . . 5  |-  ( ( ( y  e.  Fin  /\  y  C_  X )  /\  P  e.  ( U `  y )
)  <->  ( y  e. 
Fin  /\  ( y  C_  X  /\  P  e.  ( U `  y
) ) ) )
1311, 12sylib 189 . . . 4  |-  ( ( y  e.  ( Fin 
i^i  ~P X )  /\  P  e.  ( U `  y ) )  -> 
( y  e.  Fin  /\  ( y  C_  X  /\  P  e.  ( U `  y )
) ) )
1413reximi2 2772 . . 3  |-  ( E. y  e.  ( Fin 
i^i  ~P X ) P  e.  ( U `  y )  ->  E. y  e.  Fin  ( y  C_  X  /\  P  e.  ( U `  y ) ) )
156, 14syl6bi 220 . 2  |-  ( ( K  e.  AtLat  /\  X  C_  A )  ->  ( P  e.  ( U `  X )  ->  E. y  e.  Fin  ( y  C_  X  /\  P  e.  ( U `  y ) ) ) )
16153impia 1150 1  |-  ( ( K  e.  AtLat  /\  X  C_  A  /\  P  e.  ( U `  X
) )  ->  E. y  e.  Fin  ( y  C_  X  /\  P  e.  ( U `  y ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 359    /\ w3a 936    = wceq 1649    e. wcel 1721   E.wrex 2667    i^i cin 3279    C_ wss 3280   ~Pcpw 3759   U_ciun 4053   ` cfv 5413   Fincfn 7068   Atomscatm 29746   AtLatcal 29747   PClcpclN 30369
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1662  ax-8 1683  ax-13 1723  ax-14 1725  ax-6 1740  ax-7 1745  ax-11 1757  ax-12 1946  ax-ext 2385  ax-rep 4280  ax-sep 4290  ax-nul 4298  ax-pow 4337  ax-pr 4363  ax-un 4660
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2258  df-mo 2259  df-clab 2391  df-cleq 2397  df-clel 2400  df-nfc 2529  df-ne 2569  df-nel 2570  df-ral 2671  df-rex 2672  df-reu 2673  df-rab 2675  df-v 2918  df-sbc 3122  df-csb 3212  df-dif 3283  df-un 3285  df-in 3287  df-ss 3294  df-pss 3296  df-nul 3589  df-if 3700  df-pw 3761  df-sn 3780  df-pr 3781  df-tp 3782  df-op 3783  df-uni 3976  df-int 4011  df-iun 4055  df-br 4173  df-opab 4227  df-mpt 4228  df-tr 4263  df-eprel 4454  df-id 4458  df-po 4463  df-so 4464  df-fr 4501  df-we 4503  df-ord 4544  df-on 4545  df-lim 4546  df-suc 4547  df-om 4805  df-xp 4843  df-rel 4844  df-cnv 4845  df-co 4846  df-dm 4847  df-rn 4848  df-res 4849  df-ima 4850  df-iota 5377  df-fun 5415  df-fn 5416  df-f 5417  df-f1 5418  df-fo 5419  df-f1o 5420  df-fv 5421  df-ov 6043  df-oprab 6044  df-mpt2 6045  df-1st 6308  df-2nd 6309  df-undef 6502  df-riota 6508  df-recs 6592  df-rdg 6627  df-1o 6683  df-oadd 6687  df-er 6864  df-en 7069  df-fin 7072  df-poset 14358  df-plt 14370  df-lub 14386  df-join 14388  df-lat 14430  df-covers 29749  df-ats 29750  df-atl 29781  df-psubsp 29985  df-pclN 30370
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