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Theorem pwxpndom2 9032
Description: The powerset of a Dedekind-infinite set does not inject into its Cartesian product with itself. (Contributed by Mario Carneiro, 31-May-2015.)
Assertion
Ref Expression
pwxpndom2  |-  ( om  ~<_  A  ->  -.  ~P A  ~<_  ( A  +c  ( A  X.  A ) ) )

Proof of Theorem pwxpndom2
Dummy variables  n  x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 pwfseq 9031 . 2  |-  ( om  ~<_  A  ->  -.  ~P A  ~<_  U_ n  e.  om  ( A  ^m  n ) )
2 reldom 7515 . . . . . . 7  |-  Rel  ~<_
32brrelex2i 5030 . . . . . 6  |-  ( om  ~<_  A  ->  A  e.  _V )
4 oveq1 6277 . . . . . . . 8  |-  ( x  =  A  ->  (
x  ^m  1o )  =  ( A  ^m  1o ) )
5 id 22 . . . . . . . 8  |-  ( x  =  A  ->  x  =  A )
64, 5breq12d 4452 . . . . . . 7  |-  ( x  =  A  ->  (
( x  ^m  1o )  ~~  x  <->  ( A  ^m  1o )  ~~  A
) )
7 df1o2 7134 . . . . . . . . 9  |-  1o  =  { (/) }
87oveq2i 6281 . . . . . . . 8  |-  ( x  ^m  1o )  =  ( x  ^m  { (/)
} )
9 vex 3109 . . . . . . . . 9  |-  x  e. 
_V
10 0ex 4569 . . . . . . . . 9  |-  (/)  e.  _V
119, 10mapsnen 7586 . . . . . . . 8  |-  ( x  ^m  { (/) } ) 
~~  x
128, 11eqbrtri 4458 . . . . . . 7  |-  ( x  ^m  1o )  ~~  x
136, 12vtoclg 3164 . . . . . 6  |-  ( A  e.  _V  ->  ( A  ^m  1o )  ~~  A )
14 ensym 7557 . . . . . 6  |-  ( ( A  ^m  1o ) 
~~  A  ->  A  ~~  ( A  ^m  1o ) )
153, 13, 143syl 20 . . . . 5  |-  ( om  ~<_  A  ->  A  ~~  ( A  ^m  1o ) )
16 map2xp 7680 . . . . . 6  |-  ( A  e.  _V  ->  ( A  ^m  2o )  ~~  ( A  X.  A
) )
17 ensym 7557 . . . . . 6  |-  ( ( A  ^m  2o ) 
~~  ( A  X.  A )  ->  ( A  X.  A )  ~~  ( A  ^m  2o ) )
183, 16, 173syl 20 . . . . 5  |-  ( om  ~<_  A  ->  ( A  X.  A )  ~~  ( A  ^m  2o ) )
19 elmapi 7433 . . . . . . . . . . 11  |-  ( x  e.  ( A  ^m  1o )  ->  x : 1o --> A )
20 fdm 5717 . . . . . . . . . . 11  |-  ( x : 1o --> A  ->  dom  x  =  1o )
2119, 20syl 16 . . . . . . . . . 10  |-  ( x  e.  ( A  ^m  1o )  ->  dom  x  =  1o )
2221adantr 463 . . . . . . . . 9  |-  ( ( x  e.  ( A  ^m  1o )  /\  x  e.  ( A  ^m  2o ) )  ->  dom  x  =  1o )
23 1onn 7280 . . . . . . . . . . . . . 14  |-  1o  e.  om
2423elexi 3116 . . . . . . . . . . . . 13  |-  1o  e.  _V
2524sucid 4946 . . . . . . . . . . . 12  |-  1o  e.  suc  1o
26 df-2o 7123 . . . . . . . . . . . 12  |-  2o  =  suc  1o
2725, 26eleqtrri 2541 . . . . . . . . . . 11  |-  1o  e.  2o
28 1on 7129 . . . . . . . . . . . 12  |-  1o  e.  On
2928onirri 4973 . . . . . . . . . . 11  |-  -.  1o  e.  1o
30 nelneq2 2572 . . . . . . . . . . 11  |-  ( ( 1o  e.  2o  /\  -.  1o  e.  1o )  ->  -.  2o  =  1o )
3127, 29, 30mp2an 670 . . . . . . . . . 10  |-  -.  2o  =  1o
32 elmapi 7433 . . . . . . . . . . . . 13  |-  ( x  e.  ( A  ^m  2o )  ->  x : 2o --> A )
33 fdm 5717 . . . . . . . . . . . . 13  |-  ( x : 2o --> A  ->  dom  x  =  2o )
3432, 33syl 16 . . . . . . . . . . . 12  |-  ( x  e.  ( A  ^m  2o )  ->  dom  x  =  2o )
3534adantl 464 . . . . . . . . . . 11  |-  ( ( x  e.  ( A  ^m  1o )  /\  x  e.  ( A  ^m  2o ) )  ->  dom  x  =  2o )
3635eqeq1d 2456 . . . . . . . . . 10  |-  ( ( x  e.  ( A  ^m  1o )  /\  x  e.  ( A  ^m  2o ) )  -> 
( dom  x  =  1o 
<->  2o  =  1o ) )
3731, 36mtbiri 301 . . . . . . . . 9  |-  ( ( x  e.  ( A  ^m  1o )  /\  x  e.  ( A  ^m  2o ) )  ->  -.  dom  x  =  1o )
3822, 37pm2.65i 173 . . . . . . . 8  |-  -.  (
x  e.  ( A  ^m  1o )  /\  x  e.  ( A  ^m  2o ) )
39 elin 3673 . . . . . . . 8  |-  ( x  e.  ( ( A  ^m  1o )  i^i  ( A  ^m  2o ) )  <->  ( x  e.  ( A  ^m  1o )  /\  x  e.  ( A  ^m  2o ) ) )
4038, 39mtbir 297 . . . . . . 7  |-  -.  x  e.  ( ( A  ^m  1o )  i^i  ( A  ^m  2o ) )
4140a1i 11 . . . . . 6  |-  ( om  ~<_  A  ->  -.  x  e.  ( ( A  ^m  1o )  i^i  ( A  ^m  2o ) ) )
4241eq0rdv 3819 . . . . 5  |-  ( om  ~<_  A  ->  ( ( A  ^m  1o )  i^i  ( A  ^m  2o ) )  =  (/) )
43 cdaenun 8545 . . . . 5  |-  ( ( A  ~~  ( A  ^m  1o )  /\  ( A  X.  A
)  ~~  ( A  ^m  2o )  /\  (
( A  ^m  1o )  i^i  ( A  ^m  2o ) )  =  (/) )  ->  ( A  +c  ( A  X.  A
) )  ~~  (
( A  ^m  1o )  u.  ( A  ^m  2o ) ) )
4415, 18, 42, 43syl3anc 1226 . . . 4  |-  ( om  ~<_  A  ->  ( A  +c  ( A  X.  A
) )  ~~  (
( A  ^m  1o )  u.  ( A  ^m  2o ) ) )
45 omex 8051 . . . . . 6  |-  om  e.  _V
46 ovex 6298 . . . . . 6  |-  ( A  ^m  n )  e. 
_V
4745, 46iunex 6753 . . . . 5  |-  U_ n  e.  om  ( A  ^m  n )  e.  _V
48 oveq2 6278 . . . . . . . 8  |-  ( n  =  1o  ->  ( A  ^m  n )  =  ( A  ^m  1o ) )
4948ssiun2s 4359 . . . . . . 7  |-  ( 1o  e.  om  ->  ( A  ^m  1o )  C_  U_ n  e.  om  ( A  ^m  n ) )
5023, 49ax-mp 5 . . . . . 6  |-  ( A  ^m  1o )  C_  U_ n  e.  om  ( A  ^m  n )
51 2onn 7281 . . . . . . 7  |-  2o  e.  om
52 oveq2 6278 . . . . . . . 8  |-  ( n  =  2o  ->  ( A  ^m  n )  =  ( A  ^m  2o ) )
5352ssiun2s 4359 . . . . . . 7  |-  ( 2o  e.  om  ->  ( A  ^m  2o )  C_  U_ n  e.  om  ( A  ^m  n ) )
5451, 53ax-mp 5 . . . . . 6  |-  ( A  ^m  2o )  C_  U_ n  e.  om  ( A  ^m  n )
5550, 54unssi 3665 . . . . 5  |-  ( ( A  ^m  1o )  u.  ( A  ^m  2o ) )  C_  U_ n  e.  om  ( A  ^m  n )
56 ssdomg 7554 . . . . 5  |-  ( U_ n  e.  om  ( A  ^m  n )  e. 
_V  ->  ( ( ( A  ^m  1o )  u.  ( A  ^m  2o ) )  C_  U_ n  e.  om  ( A  ^m  n )  ->  (
( A  ^m  1o )  u.  ( A  ^m  2o ) )  ~<_  U_ n  e.  om  ( A  ^m  n ) ) )
5747, 55, 56mp2 9 . . . 4  |-  ( ( A  ^m  1o )  u.  ( A  ^m  2o ) )  ~<_  U_ n  e.  om  ( A  ^m  n )
58 endomtr 7566 . . . 4  |-  ( ( ( A  +c  ( A  X.  A ) ) 
~~  ( ( A  ^m  1o )  u.  ( A  ^m  2o ) )  /\  (
( A  ^m  1o )  u.  ( A  ^m  2o ) )  ~<_  U_ n  e.  om  ( A  ^m  n ) )  ->  ( A  +c  ( A  X.  A
) )  ~<_  U_ n  e.  om  ( A  ^m  n ) )
5944, 57, 58sylancl 660 . . 3  |-  ( om  ~<_  A  ->  ( A  +c  ( A  X.  A
) )  ~<_  U_ n  e.  om  ( A  ^m  n ) )
60 domtr 7561 . . . 4  |-  ( ( ~P A  ~<_  ( A  +c  ( A  X.  A ) )  /\  ( A  +c  ( A  X.  A ) )  ~<_ 
U_ n  e.  om  ( A  ^m  n
) )  ->  ~P A  ~<_  U_ n  e.  om  ( A  ^m  n
) )
6160expcom 433 . . 3  |-  ( ( A  +c  ( A  X.  A ) )  ~<_ 
U_ n  e.  om  ( A  ^m  n
)  ->  ( ~P A  ~<_  ( A  +c  ( A  X.  A
) )  ->  ~P A  ~<_  U_ n  e.  om  ( A  ^m  n
) ) )
6259, 61syl 16 . 2  |-  ( om  ~<_  A  ->  ( ~P A  ~<_  ( A  +c  ( A  X.  A
) )  ->  ~P A  ~<_  U_ n  e.  om  ( A  ^m  n
) ) )
631, 62mtod 177 1  |-  ( om  ~<_  A  ->  -.  ~P A  ~<_  ( A  +c  ( A  X.  A ) ) )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 367    = wceq 1398    e. wcel 1823   _Vcvv 3106    u. cun 3459    i^i cin 3460    C_ wss 3461   (/)c0 3783   ~Pcpw 3999   {csn 4016   U_ciun 4315   class class class wbr 4439   suc csuc 4869    X. cxp 4986   dom cdm 4988   -->wf 5566  (class class class)co 6270   omcom 6673   1oc1o 7115   2oc2o 7116    ^m cmap 7412    ~~ cen 7506    ~<_ cdom 7507    +c ccda 8538
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-rep 4550  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565  ax-inf2 8049
This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-fal 1404  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-ral 2809  df-rex 2810  df-reu 2811  df-rmo 2812  df-rab 2813  df-v 3108  df-sbc 3325  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-pss 3477  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-tp 4021  df-op 4023  df-uni 4236  df-int 4272  df-iun 4317  df-br 4440  df-opab 4498  df-mpt 4499  df-tr 4533  df-eprel 4780  df-id 4784  df-po 4789  df-so 4790  df-fr 4827  df-se 4828  df-we 4829  df-ord 4870  df-on 4871  df-lim 4872  df-suc 4873  df-xp 4994  df-rel 4995  df-cnv 4996  df-co 4997  df-dm 4998  df-rn 4999  df-res 5000  df-ima 5001  df-iota 5534  df-fun 5572  df-fn 5573  df-f 5574  df-f1 5575  df-fo 5576  df-f1o 5577  df-fv 5578  df-isom 5579  df-riota 6232  df-ov 6273  df-oprab 6274  df-mpt2 6275  df-om 6674  df-1st 6773  df-2nd 6774  df-supp 6892  df-recs 7034  df-rdg 7068  df-seqom 7105  df-1o 7122  df-2o 7123  df-oadd 7126  df-omul 7127  df-oexp 7128  df-er 7303  df-map 7414  df-en 7510  df-dom 7511  df-sdom 7512  df-fin 7513  df-fsupp 7822  df-oi 7927  df-har 7976  df-cnf 8070  df-card 8311  df-cda 8539
This theorem is referenced by:  pwxpndom  9033  pwcdandom  9034
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