Theorem 3nsssucpw1 7319

Description: Negated excluded middle implies that 3_o is not a subset of the successor of the power set of 1_o. (Contributed by James E. Hanson and Jim Kingdon, 31-Jul-2024.)

Assertion

Ref	Expression
3nsssucpw1	⊢ (¬ EXMID → ¬ 3o ⊆ suc 𝒫 1o)

Proof of Theorem 3nsssucpw1

Step	Hyp	Ref	Expression
1		df-3o 6485	. . . . . 6 ⊢ 3o = suc 2o
2	1	sseq1i 3210	. . . . 5 ⊢ (3o ⊆ suc 𝒫 1o ↔ suc 2o ⊆ suc 𝒫 1o)
3		1lt2o 6509	. . . . . . . . 9 ⊢ 1o ∈ 2o
4		ssnel 4606	. . . . . . . . 9 ⊢ (2o ⊆ 1o → ¬ 1o ∈ 2o)
5	3, 4	mt2 641	. . . . . . . 8 ⊢ ¬ 2o ⊆ 1o
6		2onn 6588	. . . . . . . . . 10 ⊢ 2o ∈ ω
7	6	elexi 2775	. . . . . . . . 9 ⊢ 2o ∈ V
8	7	elpw 3612	. . . . . . . 8 ⊢ (2o ∈ 𝒫 1o ↔ 2o ⊆ 1o)
9	5, 8	mtbir 672	. . . . . . 7 ⊢ ¬ 2o ∈ 𝒫 1o
10	9	a1i 9	. . . . . 6 ⊢ (suc 2o ⊆ suc 𝒫 1o → ¬ 2o ∈ 𝒫 1o)
11		sucssel 4460	. . . . . . . . 9 ⊢ (2o ∈ ω → (suc 2o ⊆ suc 𝒫 1o → 2o ∈ suc 𝒫 1o))
12	6, 11	ax-mp 5	. . . . . . . 8 ⊢ (suc 2o ⊆ suc 𝒫 1o → 2o ∈ suc 𝒫 1o)
13		elsuci 4439	. . . . . . . 8 ⊢ (2o ∈ suc 𝒫 1o → (2o ∈ 𝒫 1o ∨ 2o = 𝒫 1o))
14	12, 13	syl 14	. . . . . . 7 ⊢ (suc 2o ⊆ suc 𝒫 1o → (2o ∈ 𝒫 1o ∨ 2o = 𝒫 1o))
15	14	orcomd 730	. . . . . 6 ⊢ (suc 2o ⊆ suc 𝒫 1o → (2o = 𝒫 1o ∨ 2o ∈ 𝒫 1o))
16	10, 15	ecased 1360	. . . . 5 ⊢ (suc 2o ⊆ suc 𝒫 1o → 2o = 𝒫 1o)
17	2, 16	sylbi 121	. . . 4 ⊢ (3o ⊆ suc 𝒫 1o → 2o = 𝒫 1o)
18	17	eqcomd 2202	. . 3 ⊢ (3o ⊆ suc 𝒫 1o → 𝒫 1o = 2o)
19		exmidpweq 6979	. . 3 ⊢ (EXMID ↔ 𝒫 1o = 2o)
20	18, 19	sylibr 134	. 2 ⊢ (3o ⊆ suc 𝒫 1o → EXMID)
21	20	con3i 633	1 ⊢ (¬ EXMID → ¬ 3o ⊆ suc 𝒫 1o)

Syntax hints:  ¬ wn 3   → wi 4   ∨ wo 709   = wceq 1364   ∈ wcel 2167   ⊆ wss 3157  𝒫 cpw 3606  EXMIDwem 4228  suc csuc 4401  ωcom 4627  1_oc1o 6476  2_oc2o 6477  3_oc3o 6478

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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-nul 4160  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574

This theorem depends on definitions:  df-bi 117  df-dc 836  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-ral 2480  df-rex 2481  df-v 2765  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-pw 3608  df-sn 3629  df-pr 3630  df-uni 3841  df-int 3876  df-tr 4133  df-exmid 4229  df-iord 4402  df-on 4404  df-suc 4407  df-iom 4628  df-1o 6483  df-2o 6484  df-3o 6485

This theorem is referenced by:  onntri45  7324