Theorem oenord1ex 43304

Description: When ordinals two and three are both raised to the power of omega, ordering of the powers is not equivalent to the ordering of the bases. Remark 3.26 of [Schloeder] p. 11. (Contributed by RP, 30-Jan-2025.)

Assertion

Ref	Expression
oenord1ex	⊢ ¬ (2o ∈ 3o ↔ (2o ↑o ω) ∈ (3o ↑o ω))

Proof of Theorem oenord1ex

Step	Hyp	Ref	Expression
1		2oex 8445	. . . . 5 ⊢ 2o ∈ V
2	1	tpid3 4737	. . . 4 ⊢ 2o ∈ {∅, 1o, 2o}
3		df3o2 43302	. . . 4 ⊢ 3o = {∅, 1o, 2o}
4	2, 3	eleqtrri 2827	. . 3 ⊢ 2o ∈ 3o
5		ordom 7852	. . . 4 ⊢ Ord ω
6		ordirr 6350	. . . . 5 ⊢ (Ord ω → ¬ ω ∈ ω)
7		2onn 8606	. . . . . . 7 ⊢ 2o ∈ ω
8		1oex 8444	. . . . . . . . 9 ⊢ 1o ∈ V
9	8	prid2 4727	. . . . . . . 8 ⊢ 1o ∈ {∅, 1o}
10		df2o3 8442	. . . . . . . 8 ⊢ 2o = {∅, 1o}
11	9, 10	eleqtrri 2827	. . . . . . 7 ⊢ 1o ∈ 2o
12		nnoeomeqom 43301	. . . . . . 7 ⊢ ((2o ∈ ω ∧ 1o ∈ 2o) → (2o ↑o ω) = ω)
13	7, 11, 12	mp2an 692	. . . . . 6 ⊢ (2o ↑o ω) = ω
14		3onn 8608	. . . . . . 7 ⊢ 3o ∈ ω
15	8	tpid2 4734	. . . . . . . 8 ⊢ 1o ∈ {∅, 1o, 2o}
16	15, 3	eleqtrri 2827	. . . . . . 7 ⊢ 1o ∈ 3o
17		nnoeomeqom 43301	. . . . . . 7 ⊢ ((3o ∈ ω ∧ 1o ∈ 3o) → (3o ↑o ω) = ω)
18	14, 16, 17	mp2an 692	. . . . . 6 ⊢ (3o ↑o ω) = ω
19	13, 18	eleq12i 2821	. . . . 5 ⊢ ((2o ↑o ω) ∈ (3o ↑o ω) ↔ ω ∈ ω)
20	6, 19	sylnibr 329	. . . 4 ⊢ (Ord ω → ¬ (2o ↑o ω) ∈ (3o ↑o ω))
21	5, 20	ax-mp 5	. . 3 ⊢ ¬ (2o ↑o ω) ∈ (3o ↑o ω)
22	4, 21	2th 264	. 2 ⊢ (2o ∈ 3o ↔ ¬ (2o ↑o ω) ∈ (3o ↑o ω))
23		xor3 382	. 2 ⊢ (¬ (2o ∈ 3o ↔ (2o ↑o ω) ∈ (3o ↑o ω)) ↔ (2o ∈ 3o ↔ ¬ (2o ↑o ω) ∈ (3o ↑o ω)))
24	22, 23	mpbir 231	1 ⊢ ¬ (2o ∈ 3o ↔ (2o ↑o ω) ∈ (3o ↑o ω))

Syntax hints:  ¬ wn 3   ↔ wb 206   = wceq 1540   ∈ wcel 2109  ∅c0 4296  {cpr 4591  {ctp 4593  Ord word 6331  (class class class)co 7387  ωcom 7842  1_oc1o 8427  2_oc2o 8428  3_oc3o 8429   ↑_o coe 8433

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5234  ax-sep 5251  ax-nul 5261  ax-pr 5387  ax-un 7711  ax-inf2 9594

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3355  df-rab 3406  df-v 3449  df-sbc 3754  df-csb 3863  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-pss 3934  df-nul 4297  df-if 4489  df-pw 4565  df-sn 4590  df-pr 4592  df-tp 4594  df-op 4596  df-uni 4872  df-iun 4957  df-br 5108  df-opab 5170  df-mpt 5189  df-tr 5215  df-id 5533  df-eprel 5538  df-po 5546  df-so 5547  df-fr 5591  df-we 5593  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-rn 5649  df-res 5650  df-ima 5651  df-pred 6274  df-ord 6335  df-on 6336  df-lim 6337  df-suc 6338  df-iota 6464  df-fun 6513  df-fn 6514  df-f 6515  df-f1 6516  df-fo 6517  df-f1o 6518  df-fv 6519  df-ov 7390  df-oprab 7391  df-mpo 7392  df-om 7843  df-2nd 7969  df-frecs 8260  df-wrecs 8291  df-recs 8340  df-rdg 8378  df-1o 8434  df-2o 8435  df-3o 8436  df-oadd 8438  df-omul 8439  df-oexp 8440

This theorem is referenced by:  oenord1  43305