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| Mirrors > Home > MPE Home > Th. List > oaword | Structured version Visualization version GIF version | ||
| Description: Weak ordering property of ordinal addition. (Contributed by NM, 6-Dec-2004.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
| Ref | Expression |
|---|---|
| oaword | ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ⊆ 𝐵 ↔ (𝐶 +o 𝐴) ⊆ (𝐶 +o 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oaord 8537 | . . . 4 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ∈ 𝐴 ↔ (𝐶 +o 𝐵) ∈ (𝐶 +o 𝐴))) | |
| 2 | 1 | 3com12 1141 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ∈ 𝐴 ↔ (𝐶 +o 𝐵) ∈ (𝐶 +o 𝐴))) |
| 3 | 2 | notbid 321 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (¬ 𝐵 ∈ 𝐴 ↔ ¬ (𝐶 +o 𝐵) ∈ (𝐶 +o 𝐴))) |
| 4 | ontri1 6396 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ⊆ 𝐵 ↔ ¬ 𝐵 ∈ 𝐴)) | |
| 5 | 4 | 3adant3 1150 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ⊆ 𝐵 ↔ ¬ 𝐵 ∈ 𝐴)) |
| 6 | oacl 8525 | . . . . 5 ⊢ ((𝐶 ∈ On ∧ 𝐴 ∈ On) → (𝐶 +o 𝐴) ∈ On) | |
| 7 | 6 | ancoms 464 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐶 ∈ On) → (𝐶 +o 𝐴) ∈ On) |
| 8 | 7 | 3adant2 1149 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐶 +o 𝐴) ∈ On) |
| 9 | oacl 8525 | . . . . 5 ⊢ ((𝐶 ∈ On ∧ 𝐵 ∈ On) → (𝐶 +o 𝐵) ∈ On) | |
| 10 | 9 | ancoms 464 | . . . 4 ⊢ ((𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐶 +o 𝐵) ∈ On) |
| 11 | 10 | 3adant1 1148 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐶 +o 𝐵) ∈ On) |
| 12 | ontri1 6396 | . . 3 ⊢ (((𝐶 +o 𝐴) ∈ On ∧ (𝐶 +o 𝐵) ∈ On) → ((𝐶 +o 𝐴) ⊆ (𝐶 +o 𝐵) ↔ ¬ (𝐶 +o 𝐵) ∈ (𝐶 +o 𝐴))) | |
| 13 | 8, 11, 12 | syl2anc 596 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → ((𝐶 +o 𝐴) ⊆ (𝐶 +o 𝐵) ↔ ¬ (𝐶 +o 𝐵) ∈ (𝐶 +o 𝐴))) |
| 14 | 3, 5, 13 | 3bitr4d 314 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ⊆ 𝐵 ↔ (𝐶 +o 𝐴) ⊆ (𝐶 +o 𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ w3a 1103 ∈ wcel 2145 ⊆ wss 3902 Oncon0 6361 (class class class)co 7416 +o coa 8455 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pr 5402 ax-un 7739 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-oadd 8462 |
| This theorem is used by: oaword1 8542 oaass 8551 omwordri 8562 omlimcl 8568 oaabs2 8640 oasubex 44114 oaabsb 44122 omabs2 44160 |
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