MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  cplem1 Structured version   Visualization version   Unicode version

Theorem cplem1 8752
Description: Lemma for the Collection Principle cp 8754. (Contributed by NM, 17-Oct-2003.)
Hypotheses
Ref Expression
cplem1.1  |-  C  =  { y  e.  B  |  A. z  e.  B  ( rank `  y )  C_  ( rank `  z
) }
cplem1.2  |-  D  = 
U_ x  e.  A  C
Assertion
Ref Expression
cplem1  |-  A. x  e.  A  ( B  =/=  (/)  ->  ( B  i^i  D )  =/=  (/) )
Distinct variable groups:    x, y,
z, A    y, B, z
Allowed substitution hints:    B( x)    C( x, y, z)    D( x, y, z)

Proof of Theorem cplem1
Dummy variable  w is distinct from all other variables.
StepHypRef Expression
1 scott0 8749 . . . . . 6  |-  ( B  =  (/)  <->  { y  e.  B  |  A. z  e.  B  ( rank `  y )  C_  ( rank `  z
) }  =  (/) )
2 cplem1.1 . . . . . . 7  |-  C  =  { y  e.  B  |  A. z  e.  B  ( rank `  y )  C_  ( rank `  z
) }
32eqeq1i 2627 . . . . . 6  |-  ( C  =  (/)  <->  { y  e.  B  |  A. z  e.  B  ( rank `  y )  C_  ( rank `  z
) }  =  (/) )
41, 3bitr4i 267 . . . . 5  |-  ( B  =  (/)  <->  C  =  (/) )
54necon3bii 2846 . . . 4  |-  ( B  =/=  (/)  <->  C  =/=  (/) )
6 n0 3931 . . . 4  |-  ( C  =/=  (/)  <->  E. w  w  e.  C )
75, 6bitri 264 . . 3  |-  ( B  =/=  (/)  <->  E. w  w  e.  C )
8 ssrab2 3687 . . . . . . . . 9  |-  { y  e.  B  |  A. z  e.  B  ( rank `  y )  C_  ( rank `  z ) }  C_  B
92, 8eqsstri 3635 . . . . . . . 8  |-  C  C_  B
109sseli 3599 . . . . . . 7  |-  ( w  e.  C  ->  w  e.  B )
1110a1i 11 . . . . . 6  |-  ( x  e.  A  ->  (
w  e.  C  ->  w  e.  B )
)
12 ssiun2 4563 . . . . . . . 8  |-  ( x  e.  A  ->  C  C_ 
U_ x  e.  A  C )
13 cplem1.2 . . . . . . . 8  |-  D  = 
U_ x  e.  A  C
1412, 13syl6sseqr 3652 . . . . . . 7  |-  ( x  e.  A  ->  C  C_  D )
1514sseld 3602 . . . . . 6  |-  ( x  e.  A  ->  (
w  e.  C  ->  w  e.  D )
)
1611, 15jcad 555 . . . . 5  |-  ( x  e.  A  ->  (
w  e.  C  -> 
( w  e.  B  /\  w  e.  D
) ) )
17 inelcm 4032 . . . . 5  |-  ( ( w  e.  B  /\  w  e.  D )  ->  ( B  i^i  D
)  =/=  (/) )
1816, 17syl6 35 . . . 4  |-  ( x  e.  A  ->  (
w  e.  C  -> 
( B  i^i  D
)  =/=  (/) ) )
1918exlimdv 1861 . . 3  |-  ( x  e.  A  ->  ( E. w  w  e.  C  ->  ( B  i^i  D )  =/=  (/) ) )
207, 19syl5bi 232 . 2  |-  ( x  e.  A  ->  ( B  =/=  (/)  ->  ( B  i^i  D )  =/=  (/) ) )
2120rgen 2922 1  |-  A. x  e.  A  ( B  =/=  (/)  ->  ( B  i^i  D )  =/=  (/) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 384    = wceq 1483   E.wex 1704    e. wcel 1990    =/= wne 2794   A.wral 2912   {crab 2916    i^i cin 3573    C_ wss 3574   (/)c0 3915   U_ciun 4520   ` cfv 5888   rankcrnk 8626
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-iin 4523  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-om 7066  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-r1 8627  df-rank 8628
This theorem is referenced by:  cplem2  8753
  Copyright terms: Public domain W3C validator