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Theorem pw1ne3 7583
Description: The power set of 1o is not three. (Contributed by James E. Hanson and Jim Kingdon, 30-Jul-2024.)
Assertion
Ref Expression
pw1ne3 𝒫 1o ≠ 3o

Proof of Theorem pw1ne3
StepHypRef Expression
1 1lt2o 6709 . . . . 5 1o ∈ 2o
2 ssnel 4714 . . . . 5 (2o ⊆ 1o → ¬ 1o ∈ 2o)
31, 2mt2 649 . . . 4 ¬ 2o ⊆ 1o
4 2onn 6788 . . . . . 6 2o ∈ ω
54elexi 2834 . . . . 5 2o ∈ V
65elpw 3694 . . . 4 (2o ∈ 𝒫 1o ↔ 2o ⊆ 1o)
73, 6mtbir 682 . . 3 ¬ 2o ∈ 𝒫 1o
85sucid 4560 . . . . 5 2o ∈ suc 2o
9 df-3o 6683 . . . . 5 3o = suc 2o
108, 9eleqtrri 2314 . . . 4 2o ∈ 3o
11 eleq2 2302 . . . 4 (𝒫 1o = 3o → (2o ∈ 𝒫 1o ↔ 2o ∈ 3o))
1210, 11mpbiri 168 . . 3 (𝒫 1o = 3o → 2o ∈ 𝒫 1o)
137, 12mto 672 . 2 ¬ 𝒫 1o = 3o
1413neir 2423 1 𝒫 1o ≠ 3o
Colors of variables: wff set class
Syntax hints:   = wceq 1402  wcel 2209  wne 2420  wss 3220  𝒫 cpw 3688  suc csuc 4508  ωcom 4735  1oc1o 6674  2oc2o 6675  3oc3o 6676
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 4247  ax-nul 4257  ax-pow 4309  ax-pr 4344  ax-un 4576  ax-setind 4682
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 3690  df-sn 3714  df-pr 3715  df-uni 3934  df-int 3969  df-tr 4228  df-iord 4509  df-on 4511  df-suc 4514  df-iom 4736  df-1o 6681  df-2o 6682  df-3o 6683
This theorem is referenced by:  3nelsucpw1  7587
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