ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  3nelsucpw1 GIF version

Theorem 3nelsucpw1 7190
Description: Three is not an element of the successor of the power set of 1o. (Contributed by James E. Hanson and Jim Kingdon, 30-Jul-2024.)
Assertion
Ref Expression
3nelsucpw1 ¬ 3o ∈ suc 𝒫 1o

Proof of Theorem 3nelsucpw1
StepHypRef Expression
1 1lt2o 6410 . . . . 5 1o ∈ 2o
2 elelsuc 4387 . . . . 5 (1o ∈ 2o → 1o ∈ suc 2o)
31, 2ax-mp 5 . . . 4 1o ∈ suc 2o
4 df-3o 6386 . . . 4 3o = suc 2o
53, 4eleqtrri 2242 . . 3 1o ∈ 3o
6 ssnel 4546 . . 3 (3o ⊆ 1o → ¬ 1o ∈ 3o)
75, 6mt2 630 . 2 ¬ 3o ⊆ 1o
8 pw1ne3 7186 . . . . . 6 𝒫 1o ≠ 3o
98nesymi 2382 . . . . 5 ¬ 3o = 𝒫 1o
109a1i 9 . . . 4 (3o ∈ suc 𝒫 1o → ¬ 3o = 𝒫 1o)
11 elsuci 4381 . . . 4 (3o ∈ suc 𝒫 1o → (3o ∈ 𝒫 1o ∨ 3o = 𝒫 1o))
1210, 11ecased 1339 . . 3 (3o ∈ suc 𝒫 1o → 3o ∈ 𝒫 1o)
1312elpwid 3570 . 2 (3o ∈ suc 𝒫 1o → 3o ⊆ 1o)
147, 13mto 652 1 ¬ 3o ∈ suc 𝒫 1o
Colors of variables: wff set class
Syntax hints:  ¬ wn 3   = wceq 1343  wcel 2136  wss 3116  𝒫 cpw 3559  suc csuc 4343  1oc1o 6377  2oc2o 6378  3oc3o 6379
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411  ax-setind 4514
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ne 2337  df-ral 2449  df-rex 2450  df-v 2728  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-pw 3561  df-sn 3582  df-pr 3583  df-uni 3790  df-int 3825  df-tr 4081  df-iord 4344  df-on 4346  df-suc 4349  df-iom 4568  df-1o 6384  df-2o 6385  df-3o 6386
This theorem is referenced by:  onntri35  7193
  Copyright terms: Public domain W3C validator