Theorem sucpw1ne3 7581

Description: Negated excluded middle implies that the successor of the power set of 1_o is not three . (Contributed by James E. Hanson and Jim Kingdon, 30-Jul-2024.)

Assertion

Ref	Expression
sucpw1ne3	⊢ (¬ EXMID → suc 𝒫 1o ≠ 3o)

Proof of Theorem sucpw1ne3

Step	Hyp	Ref	Expression
1		pw1nel3 7580	. 2 ⊢ (¬ EXMID → ¬ 𝒫 1o ∈ 3o)
2		1oex 6685	. . . . . 6 ⊢ 1o ∈ V
3	2	pwex 4315	. . . . 5 ⊢ 𝒫 1o ∈ V
4	3	sucid 4557	. . . 4 ⊢ 𝒫 1o ∈ suc 𝒫 1o
5		eleq2 2302	. . . 4 ⊢ (suc 𝒫 1o = 3o → (𝒫 1o ∈ suc 𝒫 1o ↔ 𝒫 1o ∈ 3o))
6	4, 5	mpbii 148	. . 3 ⊢ (suc 𝒫 1o = 3o → 𝒫 1o ∈ 3o)
7	6	necon3bi 2470	. 2 ⊢ (¬ 𝒫 1o ∈ 3o → suc 𝒫 1o ≠ 3o)
8	1, 7	syl 14	1 ⊢ (¬ EXMID → suc 𝒫 1o ≠ 3o)

Syntax hints:  ¬ wn 3   → wi 4   = wceq 1402   ∈ wcel 2209   ≠ wne 2420  𝒫 cpw 3685  EXMIDwem 4326  suc csuc 4505  1_oc1o 6670  3_oc3o 6672

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 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679

This theorem depends on definitions:  df-bi 117  df-dc 847  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 3687  df-sn 3711  df-pr 3712  df-uni 3931  df-tr 4225  df-exmid 4327  df-iord 4506  df-on 4508  df-suc 4511  df-1o 6677  df-2o 6678  df-3o 6679

This theorem is referenced by: (None)