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Theorem pw1ne1 7490
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 7487 . . . 4 𝒫 1o ∈ On
21onirri 4647 . . 3 ¬ 𝒫 1o ∈ 𝒫 1o
3 df1o2 6639 . . . . 5 1o = {∅}
4 pwpw0ss 3893 . . . . . . . 8 {∅, {∅}} ⊆ 𝒫 {∅}
53pweqi 3660 . . . . . . . 8 𝒫 1o = 𝒫 {∅}
64, 5sseqtrri 3263 . . . . . . 7 {∅, {∅}} ⊆ 𝒫 1o
7 0ex 4221 . . . . . . . 8 ∅ ∈ V
8 p0ex 4284 . . . . . . . 8 {∅} ∈ V
97, 8prss 3834 . . . . . . 7 ((∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o) ↔ {∅, {∅}} ⊆ 𝒫 1o)
106, 9mpbir 146 . . . . . 6 (∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o)
1110simpri 113 . . . . 5 {∅} ∈ 𝒫 1o
123, 11eqeltri 2304 . . . 4 1o ∈ 𝒫 1o
13 eleq1 2294 . . . 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 2406 1 𝒫 1o ≠ 1o
Colors of variables: wff set class
Syntax hints:  wa 104   = wceq 1398  wcel 2202  wne 2403  wss 3201  c0 3496  𝒫 cpw 3656  {csn 3673  {cpr 3674  1oc1o 6618
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 2204  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-nul 4220  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-ral 2516  df-rex 2517  df-v 2805  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-nul 3497  df-pw 3658  df-sn 3679  df-pr 3680  df-uni 3899  df-tr 4193  df-iord 4469  df-on 4471  df-suc 4474  df-1o 6625
This theorem is referenced by:  pw1nel3  7492  sucpw1nel3  7494
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