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Theorem pw1nel3 7590
Description: Negated excluded middle implies that the power set of  1o is not an element of  3o. (Contributed by James E. Hanson and Jim Kingdon, 30-Jul-2024.)
Assertion
Ref Expression
pw1nel3  |-  ( -. EXMID  ->  -.  ~P 1o  e.  3o )

Proof of Theorem pw1nel3
StepHypRef Expression
1 pw1ne0 7587 . . . . 5  |-  ~P 1o  =/=  (/)
2 pw1ne1 7588 . . . . 5  |-  ~P 1o  =/=  1o
31, 2nelpri 3733 . . . 4  |-  -.  ~P 1o  e.  { (/) ,  1o }
43a1i 9 . . 3  |-  ( -. EXMID  ->  -.  ~P 1o  e.  { (/)
,  1o } )
5 df2o3 6702 . . . 4  |-  2o  =  { (/) ,  1o }
65eleq2i 2305 . . 3  |-  ( ~P 1o  e.  2o  <->  ~P 1o  e.  { (/) ,  1o }
)
74, 6sylnibr 688 . 2  |-  ( -. EXMID  ->  -.  ~P 1o  e.  2o )
8 exmidpweq 7216 . . . 4  |-  (EXMID  <->  ~P 1o  =  2o )
98notbii 678 . . 3  |-  ( -. EXMID  <->  -.  ~P 1o  =  2o )
10 1oex 6695 . . . . . 6  |-  1o  e.  _V
1110pwex 4320 . . . . 5  |-  ~P 1o  e.  _V
1211elsn 3725 . . . 4  |-  ( ~P 1o  e.  { 2o } 
<->  ~P 1o  =  2o )
1312notbii 678 . . 3  |-  ( -. 
~P 1o  e.  { 2o }  <->  -.  ~P 1o  =  2o )
149, 13sylbb2 138 . 2  |-  ( -. EXMID  ->  -.  ~P 1o  e.  { 2o } )
15 df-3o 6689 . . . . . . 7  |-  3o  =  suc  2o
16 df-suc 4516 . . . . . . 7  |-  suc  2o  =  ( 2o  u.  { 2o } )
1715, 16eqtri 2259 . . . . . 6  |-  3o  =  ( 2o  u.  { 2o } )
1817eleq2i 2305 . . . . 5  |-  ( ~P 1o  e.  3o  <->  ~P 1o  e.  ( 2o  u.  { 2o } ) )
19 elun 3370 . . . . 5  |-  ( ~P 1o  e.  ( 2o  u.  { 2o }
)  <->  ( ~P 1o  e.  2o  \/  ~P 1o  e.  { 2o } ) )
2018, 19bitri 184 . . . 4  |-  ( ~P 1o  e.  3o  <->  ( ~P 1o  e.  2o  \/  ~P 1o  e.  { 2o }
) )
2120notbii 678 . . 3  |-  ( -. 
~P 1o  e.  3o  <->  -.  ( ~P 1o  e.  2o  \/  ~P 1o  e.  { 2o } ) )
22 ioran 764 . . 3  |-  ( -.  ( ~P 1o  e.  2o  \/  ~P 1o  e.  { 2o } )  <->  ( -.  ~P 1o  e.  2o  /\  -.  ~P 1o  e.  { 2o } ) )
2321, 22bitri 184 . 2  |-  ( -. 
~P 1o  e.  3o  <->  ( -.  ~P 1o  e.  2o  /\  -.  ~P 1o  e.  { 2o } ) )
247, 14, 23sylanbrc 421 1  |-  ( -. EXMID  ->  -.  ~P 1o  e.  3o )
Colors of variables:    wff set class
This proof depends on syntax axioms:   -. wn 3    -> wi 4    /\ wa 104    \/ wo 720    = wceq 1402    e. wcel 2209    u. cun 3218   (/)c0 3520   ~Pcpw 3688   {csn 3709   {cpr 3710  EXMIDwem 4331   suc csuc 4510   1oc1o 6680   2oc2o 6681   3oc3o 6682
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-nul 4259  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684
This proof depends on definitions:  df-bi 117  df-dc 847  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-v 2823  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-uni 3936  df-tr 4230  df-exmid 4332  df-iord 4511  df-on 4513  df-suc 4516  df-1o 6687  df-2o 6688  df-3o 6689
This theorem is used by:  sucpw1ne3  7591  sucpw1nss3  7594
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