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

Theorem pw1ne1 7578
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 7575 . . . 4 𝒫 1o ∈ On
21onirri 4685 . . 3 ¬ 𝒫 1o ∈ 𝒫 1o
3 df1o2 6691 . . . . 5 1o = {∅}
4 pwpw0ss 3925 . . . . . . . 8 {∅, {∅}} ⊆ 𝒫 {∅}
53pweqi 3689 . . . . . . . 8 𝒫 1o = 𝒫 {∅}
64, 5sseqtrri 3283 . . . . . . 7 {∅, {∅}} ⊆ 𝒫 1o
7 0ex 4255 . . . . . . . 8 ∅ ∈ V
8 p0ex 4320 . . . . . . . 8 {∅} ∈ V
97, 8prss 3866 . . . . . . 7 ((∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o) ↔ {∅, {∅}} ⊆ 𝒫 1o)
106, 9mpbir 146 . . . . . 6 (∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o)
1110simpri 113 . . . . 5 {∅} ∈ 𝒫 1o
123, 11eqeltri 2311 . . . 4 1o ∈ 𝒫 1o
13 eleq1 2301 . . . 4 (𝒫 1o = 1o → (𝒫 1o ∈ 𝒫 1o ↔ 1o ∈ 𝒫 1o))
1412, 13mpbiri 168 . . 3 (𝒫 1o = 1o → 𝒫 1o ∈ 𝒫 1o)
152, 14mto 672 . 2 ¬ 𝒫 1o = 1o
1615neir 2423 1 𝒫 1o ≠ 1o
Colors of variables: wff set class
Syntax hints:  wa 104   = wceq 1402  wcel 2209  wne 2420  wss 3220  c0 3520  𝒫 cpw 3685  {csn 3705  {cpr 3706  1oc1o 6670
This theorem was proved from 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 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679
This theorem 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 3687  df-sn 3711  df-pr 3712  df-uni 3931  df-tr 4225  df-iord 4506  df-on 4508  df-suc 4511  df-1o 6677
This theorem is referenced by:  pw1nel3  7580  sucpw1nel3  7582
  Copyright terms: Public domain W3C validator