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

Theorem pw1ne1 7552
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 7549 . . . 4 𝒫 1o ∈ On
21onirri 4670 . . 3 ¬ 𝒫 1o ∈ 𝒫 1o
3 df1o2 6674 . . . . 5 1o = {∅}
4 pwpw0ss 3914 . . . . . . . 8 {∅, {∅}} ⊆ 𝒫 {∅}
53pweqi 3678 . . . . . . . 8 𝒫 1o = 𝒫 {∅}
64, 5sseqtrri 3277 . . . . . . 7 {∅, {∅}} ⊆ 𝒫 1o
7 0ex 4242 . . . . . . . 8 ∅ ∈ V
8 p0ex 4306 . . . . . . . 8 {∅} ∈ V
97, 8prss 3855 . . . . . . 7 ((∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o) ↔ {∅, {∅}} ⊆ 𝒫 1o)
106, 9mpbir 146 . . . . . 6 (∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o)
1110simpri 113 . . . . 5 {∅} ∈ 𝒫 1o
123, 11eqeltri 2307 . . . 4 1o ∈ 𝒫 1o
13 eleq1 2297 . . . 4 (𝒫 1o = 1o → (𝒫 1o ∈ 𝒫 1o ↔ 1o ∈ 𝒫 1o))
1412, 13mpbiri 168 . . 3 (𝒫 1o = 1o → 𝒫 1o ∈ 𝒫 1o)
152, 14mto 668 . 2 ¬ 𝒫 1o = 1o
1615neir 2417 1 𝒫 1o ≠ 1o
Colors of variables: wff set class
Syntax hints:  wa 104   = wceq 1398  wcel 2205  wne 2414  wss 3214  c0 3512  𝒫 cpw 3674  {csn 3694  {cpr 3695  1oc1o 6653
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-sep 4233  ax-nul 4241  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-v 2817  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-pw 3676  df-sn 3700  df-pr 3701  df-uni 3920  df-tr 4214  df-iord 4492  df-on 4494  df-suc 4497  df-1o 6660
This theorem is referenced by:  pw1nel3  7554  sucpw1nel3  7556
  Copyright terms: Public domain W3C validator