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Theorem sltsolem1 33519
Description: Lemma for sltso 33520. The sign expansion relationship totally orders the surreal signs. (Contributed by Scott Fenton, 8-Jun-2011.)
Assertion
Ref Expression
sltsolem1 {⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or ({1o, 2o} ∪ {∅})

Proof of Theorem sltsolem1
Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 1n0 8151 . . . . . . . 8 1o ≠ ∅
21neii 2936 . . . . . . 7 ¬ 1o = ∅
3 eqtr2 2759 . . . . . . 7 ((𝑥 = 1o𝑥 = ∅) → 1o = ∅)
42, 3mto 200 . . . . . 6 ¬ (𝑥 = 1o𝑥 = ∅)
5 1on 8139 . . . . . . . . 9 1o ∈ On
6 0elon 6226 . . . . . . . . 9 ∅ ∈ On
7 df-2o 8133 . . . . . . . . . . 11 2o = suc 1o
8 df-1o 8132 . . . . . . . . . . 11 1o = suc ∅
97, 8eqeq12i 2753 . . . . . . . . . 10 (2o = 1o ↔ suc 1o = suc ∅)
10 suc11 6276 . . . . . . . . . 10 ((1o ∈ On ∧ ∅ ∈ On) → (suc 1o = suc ∅ ↔ 1o = ∅))
119, 10syl5bb 286 . . . . . . . . 9 ((1o ∈ On ∧ ∅ ∈ On) → (2o = 1o ↔ 1o = ∅))
125, 6, 11mp2an 692 . . . . . . . 8 (2o = 1o ↔ 1o = ∅)
131, 12nemtbir 3029 . . . . . . 7 ¬ 2o = 1o
14 eqtr2 2759 . . . . . . . 8 ((𝑥 = 2o𝑥 = 1o) → 2o = 1o)
1514ancoms 462 . . . . . . 7 ((𝑥 = 1o𝑥 = 2o) → 2o = 1o)
1613, 15mto 200 . . . . . 6 ¬ (𝑥 = 1o𝑥 = 2o)
17 nsuceq0 6253 . . . . . . . 8 suc 1o ≠ ∅
187eqeq1i 2743 . . . . . . . 8 (2o = ∅ ↔ suc 1o = ∅)
1917, 18nemtbir 3029 . . . . . . 7 ¬ 2o = ∅
20 eqtr2 2759 . . . . . . . 8 ((𝑥 = 2o𝑥 = ∅) → 2o = ∅)
2120ancoms 462 . . . . . . 7 ((𝑥 = ∅ ∧ 𝑥 = 2o) → 2o = ∅)
2219, 21mto 200 . . . . . 6 ¬ (𝑥 = ∅ ∧ 𝑥 = 2o)
234, 16, 223pm3.2ni 33229 . . . . 5 ¬ ((𝑥 = 1o𝑥 = ∅) ∨ (𝑥 = 1o𝑥 = 2o) ∨ (𝑥 = ∅ ∧ 𝑥 = 2o))
24 vex 3402 . . . . . 6 𝑥 ∈ V
2524, 24brtp 33288 . . . . 5 (𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑥 ↔ ((𝑥 = 1o𝑥 = ∅) ∨ (𝑥 = 1o𝑥 = 2o) ∨ (𝑥 = ∅ ∧ 𝑥 = 2o)))
2623, 25mtbir 326 . . . 4 ¬ 𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑥
2726a1i 11 . . 3 (𝑥 ∈ {1o, 2o, ∅} → ¬ 𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑥)
28 vex 3402 . . . . . . 7 𝑦 ∈ V
2924, 28brtp 33288 . . . . . 6 (𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑦 ↔ ((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)))
30 vex 3402 . . . . . . 7 𝑧 ∈ V
3128, 30brtp 33288 . . . . . 6 (𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧 ↔ ((𝑦 = 1o𝑧 = ∅) ∨ (𝑦 = 1o𝑧 = 2o) ∨ (𝑦 = ∅ ∧ 𝑧 = 2o)))
32 eqtr2 2759 . . . . . . . . . . . . 13 ((𝑦 = 1o𝑦 = ∅) → 1o = ∅)
332, 32mto 200 . . . . . . . . . . . 12 ¬ (𝑦 = 1o𝑦 = ∅)
3433pm2.21i 119 . . . . . . . . . . 11 ((𝑦 = 1o𝑦 = ∅) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
3534ad2ant2rl 749 . . . . . . . . . 10 (((𝑦 = 1o𝑧 = ∅) ∧ (𝑥 = 1o𝑦 = ∅)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
3635expcom 417 . . . . . . . . 9 ((𝑥 = 1o𝑦 = ∅) → ((𝑦 = 1o𝑧 = ∅) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
3734ad2ant2rl 749 . . . . . . . . . 10 (((𝑦 = 1o𝑧 = 2o) ∧ (𝑥 = 1o𝑦 = ∅)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
3837expcom 417 . . . . . . . . 9 ((𝑥 = 1o𝑦 = ∅) → ((𝑦 = 1o𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
39 3mix2 1332 . . . . . . . . . . 11 ((𝑥 = 1o𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
4039ad2ant2rl 749 . . . . . . . . . 10 (((𝑥 = 1o𝑦 = ∅) ∧ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
4140ex 416 . . . . . . . . 9 ((𝑥 = 1o𝑦 = ∅) → ((𝑦 = ∅ ∧ 𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
4236, 38, 413jaod 1429 . . . . . . . 8 ((𝑥 = 1o𝑦 = ∅) → (((𝑦 = 1o𝑧 = ∅) ∨ (𝑦 = 1o𝑧 = 2o) ∨ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
43 eqtr2 2759 . . . . . . . . . . . . 13 ((𝑦 = 2o𝑦 = 1o) → 2o = 1o)
4413, 43mto 200 . . . . . . . . . . . 12 ¬ (𝑦 = 2o𝑦 = 1o)
4544pm2.21i 119 . . . . . . . . . . 11 ((𝑦 = 2o𝑦 = 1o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
4645ad2ant2lr 748 . . . . . . . . . 10 (((𝑥 = 1o𝑦 = 2o) ∧ (𝑦 = 1o𝑧 = ∅)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
4746ex 416 . . . . . . . . 9 ((𝑥 = 1o𝑦 = 2o) → ((𝑦 = 1o𝑧 = ∅) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
4845ad2ant2lr 748 . . . . . . . . . 10 (((𝑥 = 1o𝑦 = 2o) ∧ (𝑦 = 1o𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
4948ex 416 . . . . . . . . 9 ((𝑥 = 1o𝑦 = 2o) → ((𝑦 = 1o𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
50 eqtr2 2759 . . . . . . . . . . . . 13 ((𝑦 = 2o𝑦 = ∅) → 2o = ∅)
5119, 50mto 200 . . . . . . . . . . . 12 ¬ (𝑦 = 2o𝑦 = ∅)
5251pm2.21i 119 . . . . . . . . . . 11 ((𝑦 = 2o𝑦 = ∅) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
5352ad2ant2lr 748 . . . . . . . . . 10 (((𝑥 = 1o𝑦 = 2o) ∧ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
5453ex 416 . . . . . . . . 9 ((𝑥 = 1o𝑦 = 2o) → ((𝑦 = ∅ ∧ 𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
5547, 49, 543jaod 1429 . . . . . . . 8 ((𝑥 = 1o𝑦 = 2o) → (((𝑦 = 1o𝑧 = ∅) ∨ (𝑦 = 1o𝑧 = 2o) ∨ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
5645ad2ant2lr 748 . . . . . . . . . 10 (((𝑥 = ∅ ∧ 𝑦 = 2o) ∧ (𝑦 = 1o𝑧 = ∅)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
5756ex 416 . . . . . . . . 9 ((𝑥 = ∅ ∧ 𝑦 = 2o) → ((𝑦 = 1o𝑧 = ∅) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
5845ad2ant2lr 748 . . . . . . . . . 10 (((𝑥 = ∅ ∧ 𝑦 = 2o) ∧ (𝑦 = 1o𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
5958ex 416 . . . . . . . . 9 ((𝑥 = ∅ ∧ 𝑦 = 2o) → ((𝑦 = 1o𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
6052ad2ant2lr 748 . . . . . . . . . 10 (((𝑥 = ∅ ∧ 𝑦 = 2o) ∧ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
6160ex 416 . . . . . . . . 9 ((𝑥 = ∅ ∧ 𝑦 = 2o) → ((𝑦 = ∅ ∧ 𝑧 = 2o) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
6257, 59, 613jaod 1429 . . . . . . . 8 ((𝑥 = ∅ ∧ 𝑦 = 2o) → (((𝑦 = 1o𝑧 = ∅) ∨ (𝑦 = 1o𝑧 = 2o) ∨ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
6342, 55, 623jaoi 1428 . . . . . . 7 (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) → (((𝑦 = 1o𝑧 = ∅) ∨ (𝑦 = 1o𝑧 = 2o) ∨ (𝑦 = ∅ ∧ 𝑧 = 2o)) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o))))
6463imp 410 . . . . . 6 ((((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∧ ((𝑦 = 1o𝑧 = ∅) ∨ (𝑦 = 1o𝑧 = 2o) ∨ (𝑦 = ∅ ∧ 𝑧 = 2o))) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
6529, 31, 64syl2anb 601 . . . . 5 ((𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑦𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧) → ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
6624, 30brtp 33288 . . . . 5 (𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧 ↔ ((𝑥 = 1o𝑧 = ∅) ∨ (𝑥 = 1o𝑧 = 2o) ∨ (𝑥 = ∅ ∧ 𝑧 = 2o)))
6765, 66sylibr 237 . . . 4 ((𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑦𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧) → 𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧)
6867a1i 11 . . 3 ((𝑥 ∈ {1o, 2o, ∅} ∧ 𝑦 ∈ {1o, 2o, ∅} ∧ 𝑧 ∈ {1o, 2o, ∅}) → ((𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑦𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧) → 𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑧))
6924eltp 4580 . . . . 5 (𝑥 ∈ {1o, 2o, ∅} ↔ (𝑥 = 1o𝑥 = 2o𝑥 = ∅))
7028eltp 4580 . . . . 5 (𝑦 ∈ {1o, 2o, ∅} ↔ (𝑦 = 1o𝑦 = 2o𝑦 = ∅))
71 eqtr3 2760 . . . . . . . . . 10 ((𝑥 = 1o𝑦 = 1o) → 𝑥 = 𝑦)
72713mix2d 1338 . . . . . . . . 9 ((𝑥 = 1o𝑦 = 1o) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
7372ex 416 . . . . . . . 8 (𝑥 = 1o → (𝑦 = 1o → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
74 3mix2 1332 . . . . . . . . . 10 ((𝑥 = 1o𝑦 = 2o) → ((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)))
75743mix1d 1337 . . . . . . . . 9 ((𝑥 = 1o𝑦 = 2o) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
7675ex 416 . . . . . . . 8 (𝑥 = 1o → (𝑦 = 2o → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
77 3mix1 1331 . . . . . . . . . 10 ((𝑥 = 1o𝑦 = ∅) → ((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)))
78773mix1d 1337 . . . . . . . . 9 ((𝑥 = 1o𝑦 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
7978ex 416 . . . . . . . 8 (𝑥 = 1o → (𝑦 = ∅ → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
8073, 76, 793jaod 1429 . . . . . . 7 (𝑥 = 1o → ((𝑦 = 1o𝑦 = 2o𝑦 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
81 3mix2 1332 . . . . . . . . . 10 ((𝑦 = 1o𝑥 = 2o) → ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))
82813mix3d 1339 . . . . . . . . 9 ((𝑦 = 1o𝑥 = 2o) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
8382expcom 417 . . . . . . . 8 (𝑥 = 2o → (𝑦 = 1o → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
84 eqtr3 2760 . . . . . . . . . 10 ((𝑥 = 2o𝑦 = 2o) → 𝑥 = 𝑦)
85843mix2d 1338 . . . . . . . . 9 ((𝑥 = 2o𝑦 = 2o) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
8685ex 416 . . . . . . . 8 (𝑥 = 2o → (𝑦 = 2o → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
87 3mix3 1333 . . . . . . . . . 10 ((𝑦 = ∅ ∧ 𝑥 = 2o) → ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))
88873mix3d 1339 . . . . . . . . 9 ((𝑦 = ∅ ∧ 𝑥 = 2o) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
8988expcom 417 . . . . . . . 8 (𝑥 = 2o → (𝑦 = ∅ → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
9083, 86, 893jaod 1429 . . . . . . 7 (𝑥 = 2o → ((𝑦 = 1o𝑦 = 2o𝑦 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
91 3mix1 1331 . . . . . . . . . 10 ((𝑦 = 1o𝑥 = ∅) → ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))
92913mix3d 1339 . . . . . . . . 9 ((𝑦 = 1o𝑥 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
9392expcom 417 . . . . . . . 8 (𝑥 = ∅ → (𝑦 = 1o → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
94 3mix3 1333 . . . . . . . . . 10 ((𝑥 = ∅ ∧ 𝑦 = 2o) → ((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)))
95943mix1d 1337 . . . . . . . . 9 ((𝑥 = ∅ ∧ 𝑦 = 2o) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
9695ex 416 . . . . . . . 8 (𝑥 = ∅ → (𝑦 = 2o → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
97 eqtr3 2760 . . . . . . . . . 10 ((𝑥 = ∅ ∧ 𝑦 = ∅) → 𝑥 = 𝑦)
98973mix2d 1338 . . . . . . . . 9 ((𝑥 = ∅ ∧ 𝑦 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
9998ex 416 . . . . . . . 8 (𝑥 = ∅ → (𝑦 = ∅ → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
10093, 96, 993jaod 1429 . . . . . . 7 (𝑥 = ∅ → ((𝑦 = 1o𝑦 = 2o𝑦 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
10180, 90, 1003jaoi 1428 . . . . . 6 ((𝑥 = 1o𝑥 = 2o𝑥 = ∅) → ((𝑦 = 1o𝑦 = 2o𝑦 = ∅) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))))
102101imp 410 . . . . 5 (((𝑥 = 1o𝑥 = 2o𝑥 = ∅) ∧ (𝑦 = 1o𝑦 = 2o𝑦 = ∅)) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
10369, 70, 102syl2anb 601 . . . 4 ((𝑥 ∈ {1o, 2o, ∅} ∧ 𝑦 ∈ {1o, 2o, ∅}) → (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
104 biid 264 . . . . 5 (𝑥 = 𝑦𝑥 = 𝑦)
10528, 24brtp 33288 . . . . 5 (𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑥 ↔ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o)))
10629, 104, 1053orbi123i 1157 . . . 4 ((𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑦𝑥 = 𝑦𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑥) ↔ (((𝑥 = 1o𝑦 = ∅) ∨ (𝑥 = 1o𝑦 = 2o) ∨ (𝑥 = ∅ ∧ 𝑦 = 2o)) ∨ 𝑥 = 𝑦 ∨ ((𝑦 = 1o𝑥 = ∅) ∨ (𝑦 = 1o𝑥 = 2o) ∨ (𝑦 = ∅ ∧ 𝑥 = 2o))))
107103, 106sylibr 237 . . 3 ((𝑥 ∈ {1o, 2o, ∅} ∧ 𝑦 ∈ {1o, 2o, ∅}) → (𝑥{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑦𝑥 = 𝑦𝑦{⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩}𝑥))
10827, 68, 107issoi 5477 . 2 {⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or {1o, 2o, ∅}
109 df-tp 4522 . . 3 {1o, 2o, ∅} = ({1o, 2o} ∪ {∅})
110 soeq2 5465 . . 3 ({1o, 2o, ∅} = ({1o, 2o} ∪ {∅}) → ({⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or {1o, 2o, ∅} ↔ {⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or ({1o, 2o} ∪ {∅})))
111109, 110ax-mp 5 . 2 ({⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or {1o, 2o, ∅} ↔ {⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or ({1o, 2o} ∪ {∅}))
112108, 111mpbi 233 1 {⟨1o, ∅⟩, ⟨1o, 2o⟩, ⟨∅, 2o⟩} Or ({1o, 2o} ∪ {∅})
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 209  wa 399  w3o 1087  w3a 1088   = wceq 1542  wcel 2113  cun 3842  c0 4212  {csn 4517  {cpr 4519  {ctp 4521  cop 4523   class class class wbr 5031   Or wor 5442  Oncon0 6173  suc csuc 6175  1oc1o 8125  2oc2o 8126
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1916  ax-6 1974  ax-7 2019  ax-8 2115  ax-9 2123  ax-11 2161  ax-ext 2710  ax-sep 5168  ax-nul 5175  ax-pr 5297  ax-un 7480
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 847  df-3or 1089  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1787  df-sb 2074  df-clab 2717  df-cleq 2730  df-clel 2811  df-ne 2935  df-ral 3058  df-rex 3059  df-rab 3062  df-v 3400  df-dif 3847  df-un 3849  df-in 3851  df-ss 3861  df-pss 3863  df-nul 4213  df-if 4416  df-pw 4491  df-sn 4518  df-pr 4520  df-tp 4522  df-op 4524  df-uni 4798  df-br 5032  df-opab 5094  df-tr 5138  df-eprel 5435  df-po 5443  df-so 5444  df-fr 5484  df-we 5486  df-ord 6176  df-on 6177  df-suc 6179  df-1o 8132  df-2o 8133
This theorem is referenced by:  sltso  33520
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