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Theorem oawordri 8550
Description: Weak ordering property of ordinal addition. Proposition 8.7 of [TakeutiZaring] p. 59. (Contributed by NM, 7-Dec-2004.)
Assertion
Ref Expression
oawordri ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴𝐵 → (𝐴 +o 𝐶) ⊆ (𝐵 +o 𝐶)))

Proof of Theorem oawordri
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 oveq2 7417 . . . . 5 (𝑥 = ∅ → (𝐴 +o 𝑥) = (𝐴 +o ∅))
2 oveq2 7417 . . . . 5 (𝑥 = ∅ → (𝐵 +o 𝑥) = (𝐵 +o ∅))
31, 2sseq12d 4016 . . . 4 (𝑥 = ∅ → ((𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥) ↔ (𝐴 +o ∅) ⊆ (𝐵 +o ∅)))
4 oveq2 7417 . . . . 5 (𝑥 = 𝑦 → (𝐴 +o 𝑥) = (𝐴 +o 𝑦))
5 oveq2 7417 . . . . 5 (𝑥 = 𝑦 → (𝐵 +o 𝑥) = (𝐵 +o 𝑦))
64, 5sseq12d 4016 . . . 4 (𝑥 = 𝑦 → ((𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥) ↔ (𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦)))
7 oveq2 7417 . . . . 5 (𝑥 = suc 𝑦 → (𝐴 +o 𝑥) = (𝐴 +o suc 𝑦))
8 oveq2 7417 . . . . 5 (𝑥 = suc 𝑦 → (𝐵 +o 𝑥) = (𝐵 +o suc 𝑦))
97, 8sseq12d 4016 . . . 4 (𝑥 = suc 𝑦 → ((𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥) ↔ (𝐴 +o suc 𝑦) ⊆ (𝐵 +o suc 𝑦)))
10 oveq2 7417 . . . . 5 (𝑥 = 𝐶 → (𝐴 +o 𝑥) = (𝐴 +o 𝐶))
11 oveq2 7417 . . . . 5 (𝑥 = 𝐶 → (𝐵 +o 𝑥) = (𝐵 +o 𝐶))
1210, 11sseq12d 4016 . . . 4 (𝑥 = 𝐶 → ((𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥) ↔ (𝐴 +o 𝐶) ⊆ (𝐵 +o 𝐶)))
13 oa0 8516 . . . . . . 7 (𝐴 ∈ On → (𝐴 +o ∅) = 𝐴)
1413adantr 482 . . . . . 6 ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 +o ∅) = 𝐴)
15 oa0 8516 . . . . . . 7 (𝐵 ∈ On → (𝐵 +o ∅) = 𝐵)
1615adantl 483 . . . . . 6 ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 +o ∅) = 𝐵)
1714, 16sseq12d 4016 . . . . 5 ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((𝐴 +o ∅) ⊆ (𝐵 +o ∅) ↔ 𝐴𝐵))
1817biimpar 479 . . . 4 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝐴𝐵) → (𝐴 +o ∅) ⊆ (𝐵 +o ∅))
19 oacl 8535 . . . . . . . . . . 11 ((𝐴 ∈ On ∧ 𝑦 ∈ On) → (𝐴 +o 𝑦) ∈ On)
20 eloni 6375 . . . . . . . . . . 11 ((𝐴 +o 𝑦) ∈ On → Ord (𝐴 +o 𝑦))
2119, 20syl 17 . . . . . . . . . 10 ((𝐴 ∈ On ∧ 𝑦 ∈ On) → Ord (𝐴 +o 𝑦))
22 oacl 8535 . . . . . . . . . . 11 ((𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐵 +o 𝑦) ∈ On)
23 eloni 6375 . . . . . . . . . . 11 ((𝐵 +o 𝑦) ∈ On → Ord (𝐵 +o 𝑦))
2422, 23syl 17 . . . . . . . . . 10 ((𝐵 ∈ On ∧ 𝑦 ∈ On) → Ord (𝐵 +o 𝑦))
25 ordsucsssuc 7811 . . . . . . . . . 10 ((Ord (𝐴 +o 𝑦) ∧ Ord (𝐵 +o 𝑦)) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) ↔ suc (𝐴 +o 𝑦) ⊆ suc (𝐵 +o 𝑦)))
2621, 24, 25syl2an 597 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝑦 ∈ On) ∧ (𝐵 ∈ On ∧ 𝑦 ∈ On)) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) ↔ suc (𝐴 +o 𝑦) ⊆ suc (𝐵 +o 𝑦)))
2726anandirs 678 . . . . . . . 8 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑦 ∈ On) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) ↔ suc (𝐴 +o 𝑦) ⊆ suc (𝐵 +o 𝑦)))
28 oasuc 8524 . . . . . . . . . 10 ((𝐴 ∈ On ∧ 𝑦 ∈ On) → (𝐴 +o suc 𝑦) = suc (𝐴 +o 𝑦))
2928adantlr 714 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑦 ∈ On) → (𝐴 +o suc 𝑦) = suc (𝐴 +o 𝑦))
30 oasuc 8524 . . . . . . . . . 10 ((𝐵 ∈ On ∧ 𝑦 ∈ On) → (𝐵 +o suc 𝑦) = suc (𝐵 +o 𝑦))
3130adantll 713 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑦 ∈ On) → (𝐵 +o suc 𝑦) = suc (𝐵 +o 𝑦))
3229, 31sseq12d 4016 . . . . . . . 8 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑦 ∈ On) → ((𝐴 +o suc 𝑦) ⊆ (𝐵 +o suc 𝑦) ↔ suc (𝐴 +o 𝑦) ⊆ suc (𝐵 +o 𝑦)))
3327, 32bitr4d 282 . . . . . . 7 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑦 ∈ On) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) ↔ (𝐴 +o suc 𝑦) ⊆ (𝐵 +o suc 𝑦)))
3433biimpd 228 . . . . . 6 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝑦 ∈ On) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o suc 𝑦) ⊆ (𝐵 +o suc 𝑦)))
3534expcom 415 . . . . 5 (𝑦 ∈ On → ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o suc 𝑦) ⊆ (𝐵 +o suc 𝑦))))
3635adantrd 493 . . . 4 (𝑦 ∈ On → (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝐴𝐵) → ((𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o suc 𝑦) ⊆ (𝐵 +o suc 𝑦))))
37 vex 3479 . . . . . . 7 𝑥 ∈ V
38 ss2iun 5016 . . . . . . . 8 (∀𝑦𝑥 (𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → 𝑦𝑥 (𝐴 +o 𝑦) ⊆ 𝑦𝑥 (𝐵 +o 𝑦))
39 oalim 8532 . . . . . . . . . 10 ((𝐴 ∈ On ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → (𝐴 +o 𝑥) = 𝑦𝑥 (𝐴 +o 𝑦))
4039adantlr 714 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → (𝐴 +o 𝑥) = 𝑦𝑥 (𝐴 +o 𝑦))
41 oalim 8532 . . . . . . . . . 10 ((𝐵 ∈ On ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → (𝐵 +o 𝑥) = 𝑦𝑥 (𝐵 +o 𝑦))
4241adantll 713 . . . . . . . . 9 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → (𝐵 +o 𝑥) = 𝑦𝑥 (𝐵 +o 𝑦))
4340, 42sseq12d 4016 . . . . . . . 8 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → ((𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥) ↔ 𝑦𝑥 (𝐴 +o 𝑦) ⊆ 𝑦𝑥 (𝐵 +o 𝑦)))
4438, 43imbitrrid 245 . . . . . . 7 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ (𝑥 ∈ V ∧ Lim 𝑥)) → (∀𝑦𝑥 (𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥)))
4537, 44mpanr1 702 . . . . . 6 (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ Lim 𝑥) → (∀𝑦𝑥 (𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥)))
4645expcom 415 . . . . 5 (Lim 𝑥 → ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (∀𝑦𝑥 (𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥))))
4746adantrd 493 . . . 4 (Lim 𝑥 → (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝐴𝐵) → (∀𝑦𝑥 (𝐴 +o 𝑦) ⊆ (𝐵 +o 𝑦) → (𝐴 +o 𝑥) ⊆ (𝐵 +o 𝑥))))
483, 6, 9, 12, 18, 36, 47tfinds3 7854 . . 3 (𝐶 ∈ On → (((𝐴 ∈ On ∧ 𝐵 ∈ On) ∧ 𝐴𝐵) → (𝐴 +o 𝐶) ⊆ (𝐵 +o 𝐶)))
4948exp4c 434 . 2 (𝐶 ∈ On → (𝐴 ∈ On → (𝐵 ∈ On → (𝐴𝐵 → (𝐴 +o 𝐶) ⊆ (𝐵 +o 𝐶)))))
50493imp231 1114 1 ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴𝐵 → (𝐴 +o 𝐶) ⊆ (𝐵 +o 𝐶)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 397  w3a 1088   = wceq 1542  wcel 2107  wral 3062  Vcvv 3475  wss 3949  c0 4323   ciun 4998  Ord word 6364  Oncon0 6365  Lim wlim 6366  suc csuc 6367  (class class class)co 7409   +o coa 8463
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-rep 5286  ax-sep 5300  ax-nul 5307  ax-pr 5428  ax-un 7725
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3or 1089  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2942  df-ral 3063  df-rex 3072  df-reu 3378  df-rab 3434  df-v 3477  df-sbc 3779  df-csb 3895  df-dif 3952  df-un 3954  df-in 3956  df-ss 3966  df-pss 3968  df-nul 4324  df-if 4530  df-pw 4605  df-sn 4630  df-pr 4632  df-op 4636  df-uni 4910  df-iun 5000  df-br 5150  df-opab 5212  df-mpt 5233  df-tr 5267  df-id 5575  df-eprel 5581  df-po 5589  df-so 5590  df-fr 5632  df-we 5634  df-xp 5683  df-rel 5684  df-cnv 5685  df-co 5686  df-dm 5687  df-rn 5688  df-res 5689  df-ima 5690  df-pred 6301  df-ord 6368  df-on 6369  df-lim 6370  df-suc 6371  df-iota 6496  df-fun 6546  df-fn 6547  df-f 6548  df-f1 6549  df-fo 6550  df-f1o 6551  df-fv 6552  df-ov 7412  df-oprab 7413  df-mpo 7414  df-om 7856  df-2nd 7976  df-frecs 8266  df-wrecs 8297  df-recs 8371  df-rdg 8410  df-oadd 8470
This theorem is referenced by:  oaword2  8553  omwordri  8572  oaabs2  8648  omabs2  42082  oaun3lem2  42125  naddwordnexlem4  42152
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