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Theorem pw1ne1 7539
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 7536 . . . 4 𝒫 1o ∈ On
21onirri 4665 . . 3 ¬ 𝒫 1o ∈ 𝒫 1o
3 df1o2 6661 . . . . 5 1o = {∅}
4 pwpw0ss 3909 . . . . . . . 8 {∅, {∅}} ⊆ 𝒫 {∅}
53pweqi 3673 . . . . . . . 8 𝒫 1o = 𝒫 {∅}
64, 5sseqtrri 3273 . . . . . . 7 {∅, {∅}} ⊆ 𝒫 1o
7 0ex 4237 . . . . . . . 8 ∅ ∈ V
8 p0ex 4301 . . . . . . . 8 {∅} ∈ V
97, 8prss 3850 . . . . . . 7 ((∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o) ↔ {∅, {∅}} ⊆ 𝒫 1o)
106, 9mpbir 146 . . . . . 6 (∅ ∈ 𝒫 1o ∧ {∅} ∈ 𝒫 1o)
1110simpri 113 . . . . 5 {∅} ∈ 𝒫 1o
123, 11eqeltri 2305 . . . 4 1o ∈ 𝒫 1o
13 eleq1 2295 . . . 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 2415 1 𝒫 1o ≠ 1o
Colors of variables: wff set class
Syntax hints:  wa 104   = wceq 1398  wcel 2203  wne 2412  wss 3211  c0 3508  𝒫 cpw 3669  {csn 3689  {cpr 3690  1oc1o 6640
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 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-nul 4236  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-ral 2525  df-rex 2526  df-v 2815  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-pw 3671  df-sn 3695  df-pr 3696  df-uni 3915  df-tr 4209  df-iord 4487  df-on 4489  df-suc 4492  df-1o 6647
This theorem is referenced by:  pw1nel3  7541  sucpw1nel3  7543
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