ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  pw1ne1 Unicode version

Theorem pw1ne1 7588
Description: The power set of  1o is not one. (Contributed by Jim Kingdon, 30-Jul-2024.)
Assertion
Ref Expression
pw1ne1  |-  ~P 1o  =/=  1o

Proof of Theorem pw1ne1
StepHypRef Expression
1 pw1on 7585 . . . 4  |-  ~P 1o  e.  On
21onirri 4690 . . 3  |-  -.  ~P 1o  e.  ~P 1o
3 df1o2 6701 . . . . 5  |-  1o  =  { (/) }
4 pwpw0ss 3930 . . . . . . . 8  |-  { (/) ,  { (/) } }  C_  ~P { (/) }
53pweqi 3692 . . . . . . . 8  |-  ~P 1o  =  ~P { (/) }
64, 5sseqtrri 3283 . . . . . . 7  |-  { (/) ,  { (/) } }  C_  ~P 1o
7 0ex 4260 . . . . . . . 8  |-  (/)  e.  _V
8 p0ex 4325 . . . . . . . 8  |-  { (/) }  e.  _V
97, 8prss 3871 . . . . . . 7  |-  ( (
(/)  e.  ~P 1o  /\ 
{ (/) }  e.  ~P 1o )  <->  { (/) ,  { (/) } }  C_  ~P 1o )
106, 9mpbir 146 . . . . . 6  |-  ( (/)  e.  ~P 1o  /\  { (/)
}  e.  ~P 1o )
1110simpri 113 . . . . 5  |-  { (/) }  e.  ~P 1o
123, 11eqeltri 2311 . . . 4  |-  1o  e.  ~P 1o
13 eleq1 2301 . . . 4  |-  ( ~P 1o  =  1o  ->  ( ~P 1o  e.  ~P 1o 
<->  1o  e.  ~P 1o ) )
1412, 13mpbiri 168 . . 3  |-  ( ~P 1o  =  1o  ->  ~P 1o  e.  ~P 1o )
152, 14mto 672 . 2  |-  -.  ~P 1o  =  1o
1615neir 2423 1  |-  ~P 1o  =/=  1o
Colors of variables:    wff set class
This proof depends on syntax axioms:    /\ wa 104    = wceq 1402    e. wcel 2209    =/= wne 2420    C_ wss 3220   (/)c0 3520   ~Pcpw 3688   {csn 3709   {cpr 3710   1oc1o 6680
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-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-iord 4511  df-on 4513  df-suc 4516  df-1o 6687
This theorem is used by:  pw1nel3  7590  sucpw1nel3  7592
  Copyright terms: Public domain W3C validator