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Theorem pw1ne1 7206
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 7203 . . . 4  |-  ~P 1o  e.  On
21onirri 4527 . . 3  |-  -.  ~P 1o  e.  ~P 1o
3 df1o2 6408 . . . . 5  |-  1o  =  { (/) }
4 pwpw0ss 3791 . . . . . . . 8  |-  { (/) ,  { (/) } }  C_  ~P { (/) }
53pweqi 3570 . . . . . . . 8  |-  ~P 1o  =  ~P { (/) }
64, 5sseqtrri 3182 . . . . . . 7  |-  { (/) ,  { (/) } }  C_  ~P 1o
7 0ex 4116 . . . . . . . 8  |-  (/)  e.  _V
8 p0ex 4174 . . . . . . . 8  |-  { (/) }  e.  _V
97, 8prss 3736 . . . . . . 7  |-  ( (
(/)  e.  ~P 1o  /\ 
{ (/) }  e.  ~P 1o )  <->  { (/) ,  { (/) } }  C_  ~P 1o )
106, 9mpbir 145 . . . . . 6  |-  ( (/)  e.  ~P 1o  /\  { (/)
}  e.  ~P 1o )
1110simpri 112 . . . . 5  |-  { (/) }  e.  ~P 1o
123, 11eqeltri 2243 . . . 4  |-  1o  e.  ~P 1o
13 eleq1 2233 . . . 4  |-  ( ~P 1o  =  1o  ->  ( ~P 1o  e.  ~P 1o 
<->  1o  e.  ~P 1o ) )
1412, 13mpbiri 167 . . 3  |-  ( ~P 1o  =  1o  ->  ~P 1o  e.  ~P 1o )
152, 14mto 657 . 2  |-  -.  ~P 1o  =  1o
1615neir 2343 1  |-  ~P 1o  =/=  1o
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1348    e. wcel 2141    =/= wne 2340    C_ wss 3121   (/)c0 3414   ~Pcpw 3566   {csn 3583   {cpr 3584   1oc1o 6388
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-nul 4115  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-v 2732  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-nul 3415  df-pw 3568  df-sn 3589  df-pr 3590  df-uni 3797  df-tr 4088  df-iord 4351  df-on 4353  df-suc 4356  df-1o 6395
This theorem is referenced by:  pw1nel3  7208  sucpw1nel3  7210
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