Theorem sucpw1nel3 7379

Description: The successor of the power set of 1_o is not an element of 3_o. (Contributed by James E. Hanson and Jim Kingdon, 30-Jul-2024.)

Assertion

Ref	Expression
sucpw1nel3	⊢ ¬ suc 𝒫 1o ∈ 3o

Proof of Theorem sucpw1nel3

Step	Hyp	Ref	Expression
1		1oex 6533	. . . . . . 7 ⊢ 1o ∈ V
2	1	pwex 4243	. . . . . 6 ⊢ 𝒫 1o ∈ V
3	2	sucid 4482	. . . . 5 ⊢ 𝒫 1o ∈ suc 𝒫 1o
4	3	ne0ii 3478	. . . 4 ⊢ suc 𝒫 1o ≠ ∅
5		pw1ne0 7374	. . . . . . . 8 ⊢ 𝒫 1o ≠ ∅
6	2	elsn 3659	. . . . . . . 8 ⊢ (𝒫 1o ∈ {∅} ↔ 𝒫 1o = ∅)
7	5, 6	nemtbir 2467	. . . . . . 7 ⊢ ¬ 𝒫 1o ∈ {∅}
8		df1o2 6538	. . . . . . . 8 ⊢ 1o = {∅}
9	8	eleq2i 2274	. . . . . . 7 ⊢ (𝒫 1o ∈ 1o ↔ 𝒫 1o ∈ {∅})
10	7, 9	mtbir 673	. . . . . 6 ⊢ ¬ 𝒫 1o ∈ 1o
11		eleq2 2271	. . . . . . 7 ⊢ (suc 𝒫 1o = 1o → (𝒫 1o ∈ suc 𝒫 1o ↔ 𝒫 1o ∈ 1o))
12	3, 11	mpbii 148	. . . . . 6 ⊢ (suc 𝒫 1o = 1o → 𝒫 1o ∈ 1o)
13	10, 12	mto 664	. . . . 5 ⊢ ¬ suc 𝒫 1o = 1o
14	13	neir 2381	. . . 4 ⊢ suc 𝒫 1o ≠ 1o
15	4, 14	nelpri 3667	. . 3 ⊢ ¬ suc 𝒫 1o ∈ {∅, 1o}
16		df2o3 6539	. . . 4 ⊢ 2o = {∅, 1o}
17	16	eleq2i 2274	. . 3 ⊢ (suc 𝒫 1o ∈ 2o ↔ suc 𝒫 1o ∈ {∅, 1o})
18	15, 17	mtbir 673	. 2 ⊢ ¬ suc 𝒫 1o ∈ 2o
19		pw1ne1 7375	. . . . . 6 ⊢ 𝒫 1o ≠ 1o
20	5, 19	nelpri 3667	. . . . 5 ⊢ ¬ 𝒫 1o ∈ {∅, 1o}
21	16	eleq2i 2274	. . . . 5 ⊢ (𝒫 1o ∈ 2o ↔ 𝒫 1o ∈ {∅, 1o})
22	20, 21	mtbir 673	. . . 4 ⊢ ¬ 𝒫 1o ∈ 2o
23		eleq2 2271	. . . . 5 ⊢ (suc 𝒫 1o = 2o → (𝒫 1o ∈ suc 𝒫 1o ↔ 𝒫 1o ∈ 2o))
24	3, 23	mpbii 148	. . . 4 ⊢ (suc 𝒫 1o = 2o → 𝒫 1o ∈ 2o)
25	22, 24	mto 664	. . 3 ⊢ ¬ suc 𝒫 1o = 2o
26	2	sucex 4565	. . . 4 ⊢ suc 𝒫 1o ∈ V
27	26	elsn 3659	. . 3 ⊢ (suc 𝒫 1o ∈ {2o} ↔ suc 𝒫 1o = 2o)
28	25, 27	mtbir 673	. 2 ⊢ ¬ suc 𝒫 1o ∈ {2o}
29		ioran 754	. . 3 ⊢ (¬ (suc 𝒫 1o ∈ 2o ∨ suc 𝒫 1o ∈ {2o}) ↔ (¬ suc 𝒫 1o ∈ 2o ∧ ¬ suc 𝒫 1o ∈ {2o}))
30		df-3o 6527	. . . . . 6 ⊢ 3o = suc 2o
31		df-suc 4436	. . . . . 6 ⊢ suc 2o = (2o ∪ {2o})
32	30, 31	eqtri 2228	. . . . 5 ⊢ 3o = (2o ∪ {2o})
33	32	eleq2i 2274	. . . 4 ⊢ (suc 𝒫 1o ∈ 3o ↔ suc 𝒫 1o ∈ (2o ∪ {2o}))
34		elun 3322	. . . 4 ⊢ (suc 𝒫 1o ∈ (2o ∪ {2o}) ↔ (suc 𝒫 1o ∈ 2o ∨ suc 𝒫 1o ∈ {2o}))
35	33, 34	bitri 184	. . 3 ⊢ (suc 𝒫 1o ∈ 3o ↔ (suc 𝒫 1o ∈ 2o ∨ suc 𝒫 1o ∈ {2o}))
36	29, 35	xchnxbir 683	. 2 ⊢ (¬ suc 𝒫 1o ∈ 3o ↔ (¬ suc 𝒫 1o ∈ 2o ∧ ¬ suc 𝒫 1o ∈ {2o}))
37	18, 28, 36	mpbir2an 945	1 ⊢ ¬ suc 𝒫 1o ∈ 3o

Syntax hints:  ¬ wn 3   ∧ wa 104   ∨ wo 710   = wceq 1373   ∈ wcel 2178   ∪ cun 3172  ∅c0 3468  𝒫 cpw 3626  {csn 3643  {cpr 3644  suc csuc 4430  1_oc1o 6518  2_oc2o 6519  3_oc3o 6520

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 615  ax-in2 616  ax-io 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2180  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-nul 4186  ax-pow 4234  ax-pr 4269  ax-un 4498  ax-setind 4603

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ne 2379  df-ral 2491  df-rex 2492  df-v 2778  df-dif 3176  df-un 3178  df-in 3180  df-ss 3187  df-nul 3469  df-pw 3628  df-sn 3649  df-pr 3650  df-uni 3865  df-tr 4159  df-iord 4431  df-on 4433  df-suc 4436  df-1o 6525  df-2o 6526  df-3o 6527

This theorem is referenced by:  onntri35  7383