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Theorem oneptri 43702
Description: The strict, complete (linear) order on the ordinals is complete. Theorem 1.9(iii) of [Schloeder] p. 1. (Contributed by RP, 15-Jan-2025.)
Assertion
Ref Expression
oneptri ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 E 𝐵𝐵 E 𝐴𝐴 = 𝐵))

Proof of Theorem oneptri
StepHypRef Expression
1 epsoon 43698 . . 3 E Or On
2 sotrieq 5557 . . 3 (( E Or On ∧ (𝐴 ∈ On ∧ 𝐵 ∈ On)) → (𝐴 = 𝐵 ↔ ¬ (𝐴 E 𝐵𝐵 E 𝐴)))
31, 2mpan 696 . 2 ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 = 𝐵 ↔ ¬ (𝐴 E 𝐵𝐵 E 𝐴)))
4 xoror 1525 . . 3 (((𝐴 E 𝐵𝐵 E 𝐴) ⊻ 𝐴 = 𝐵) → ((𝐴 E 𝐵𝐵 E 𝐴) ∨ 𝐴 = 𝐵))
5 xorcom 1521 . . . 4 (((𝐴 E 𝐵𝐵 E 𝐴) ⊻ 𝐴 = 𝐵) ↔ (𝐴 = 𝐵 ⊻ (𝐴 E 𝐵𝐵 E 𝐴)))
6 df-xor 1519 . . . 4 ((𝐴 = 𝐵 ⊻ (𝐴 E 𝐵𝐵 E 𝐴)) ↔ ¬ (𝐴 = 𝐵 ↔ (𝐴 E 𝐵𝐵 E 𝐴)))
7 xor3 383 . . . 4 (¬ (𝐴 = 𝐵 ↔ (𝐴 E 𝐵𝐵 E 𝐴)) ↔ (𝐴 = 𝐵 ↔ ¬ (𝐴 E 𝐵𝐵 E 𝐴)))
85, 6, 73bitrri 299 . . 3 ((𝐴 = 𝐵 ↔ ¬ (𝐴 E 𝐵𝐵 E 𝐴)) ↔ ((𝐴 E 𝐵𝐵 E 𝐴) ⊻ 𝐴 = 𝐵))
9 df-3or 1093 . . 3 ((𝐴 E 𝐵𝐵 E 𝐴𝐴 = 𝐵) ↔ ((𝐴 E 𝐵𝐵 E 𝐴) ∨ 𝐴 = 𝐵))
104, 8, 93imtr4i 293 . 2 ((𝐴 = 𝐵 ↔ ¬ (𝐴 E 𝐵𝐵 E 𝐴)) → (𝐴 E 𝐵𝐵 E 𝐴𝐴 = 𝐵))
113, 10syl 17 1 ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 E 𝐵𝐵 E 𝐴𝐴 = 𝐵))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 207  wa 396  wo 853  w3o 1091  wxo 1518   = wceq 1547  wcel 2119   class class class wbr 5072   E cep 5517   Or wor 5525  Oncon0 6310
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 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-ext 2711  ax-sep 5218  ax-pr 5362
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3or 1093  df-3an 1094  df-xor 1519  df-tru 1550  df-fal 1560  df-ex 1787  df-sb 2074  df-clab 2718  df-cleq 2731  df-clel 2814  df-ne 2935  df-ral 3054  df-rex 3064  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3903  df-nul 4262  df-if 4455  df-pw 4531  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-br 5073  df-opab 5135  df-tr 5180  df-eprel 5518  df-po 5526  df-so 5527  df-fr 5571  df-we 5573  df-ord 6313  df-on 6314
This theorem is referenced by: (None)
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