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Theorem pwcdaidm 7821
Description: If the natural numbers inject into  A, then  ~P A is idempotent under cardinal sum. (Contributed by Mario Carneiro, 15-May-2015.)
Assertion
Ref Expression
pwcdaidm  |-  ( om  ~<_  A  ->  ( ~P A  +c  ~P A ) 
~~  ~P A )

Proof of Theorem pwcdaidm
StepHypRef Expression
1 reldom 6869 . . . 4  |-  Rel  ~<_
21brrelex2i 4730 . . 3  |-  ( om  ~<_  A  ->  A  e.  _V )
3 pwcda1 7820 . . 3  |-  ( A  e.  _V  ->  ( ~P A  +c  ~P A
)  ~~  ~P ( A  +c  1o ) )
42, 3syl 15 . 2  |-  ( om  ~<_  A  ->  ( ~P A  +c  ~P A ) 
~~  ~P ( A  +c  1o ) )
5 infcda1 7819 . . 3  |-  ( om  ~<_  A  ->  ( A  +c  1o )  ~~  A
)
6 pwen 7034 . . 3  |-  ( ( A  +c  1o ) 
~~  A  ->  ~P ( A  +c  1o )  ~~  ~P A )
75, 6syl 15 . 2  |-  ( om  ~<_  A  ->  ~P ( A  +c  1o )  ~~  ~P A )
8 entr 6913 . 2  |-  ( ( ( ~P A  +c  ~P A )  ~~  ~P ( A  +c  1o )  /\  ~P ( A  +c  1o )  ~~  ~P A )  ->  ( ~P A  +c  ~P A
)  ~~  ~P A
)
94, 7, 8syl2anc 642 1  |-  ( om  ~<_  A  ->  ( ~P A  +c  ~P A ) 
~~  ~P A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 1684   _Vcvv 2788   ~Pcpw 3625   class class class wbr 4023   omcom 4656  (class class class)co 5858   1oc1o 6472    ~~ cen 6860    ~<_ cdom 6861    +c ccda 7793
This theorem is referenced by:  gchaclem  8292
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-13 1686  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214  ax-un 4512
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-ral 2548  df-rex 2549  df-reu 2550  df-rab 2552  df-v 2790  df-sbc 2992  df-csb 3082  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-pss 3168  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-tp 3648  df-op 3649  df-uni 3828  df-int 3863  df-iun 3907  df-br 4024  df-opab 4078  df-mpt 4079  df-tr 4114  df-eprel 4305  df-id 4309  df-po 4314  df-so 4315  df-fr 4352  df-we 4354  df-ord 4395  df-on 4396  df-lim 4397  df-suc 4398  df-om 4657  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-res 4701  df-ima 4702  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-ov 5861  df-oprab 5862  df-mpt2 5863  df-1st 6122  df-2nd 6123  df-1o 6479  df-2o 6480  df-er 6660  df-map 6774  df-en 6864  df-dom 6865  df-cda 7794
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