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| Mirrors > Home > MPE Home > Th. List > naddel1 | Structured version Visualization version GIF version | ||
| Description: Ordinal less-than is not affected by natural addition. (Contributed by Scott Fenton, 9-Sep-2024.) |
| Ref | Expression |
|---|---|
| naddel1 | ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | naddelim 8601 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ∈ 𝐵 → (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) | |
| 2 | naddssim 8600 | . . . 4 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ⊆ 𝐴 → (𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶))) | |
| 3 | 2 | 3com12 1123 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ⊆ 𝐴 → (𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶))) |
| 4 | ontri1 6340 | . . . . 5 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) | |
| 5 | 4 | ancoms 458 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) |
| 6 | 5 | 3adant3 1132 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) |
| 7 | naddcl 8592 | . . . . 5 ⊢ ((𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 +no 𝐶) ∈ On) | |
| 8 | 7 | 3adant1 1130 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 +no 𝐶) ∈ On) |
| 9 | naddcl 8592 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐶 ∈ On) → (𝐴 +no 𝐶) ∈ On) | |
| 10 | ontri1 6340 | . . . 4 ⊢ (((𝐵 +no 𝐶) ∈ On ∧ (𝐴 +no 𝐶) ∈ On) → ((𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶) ↔ ¬ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) | |
| 11 | 8, 9, 10 | 3imp3i2an 1346 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → ((𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶) ↔ ¬ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| 12 | 3, 6, 11 | 3imtr3d 293 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (¬ 𝐴 ∈ 𝐵 → ¬ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| 13 | 1, 12 | impcon4bid 227 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ w3a 1086 ∈ wcel 2111 ⊆ wss 3897 Oncon0 6306 (class class class)co 7346 +no cnadd 8580 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-int 4896 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-se 5568 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-ov 7349 df-oprab 7350 df-mpo 7351 df-1st 7921 df-2nd 7922 df-frecs 8211 df-nadd 8581 |
| This theorem is referenced by: naddel2 8603 naddss1 8604 naddel12 8615 addsproplem2 27913 mulsproplem2 28056 mulsproplem5 28059 mulsproplem6 28060 mulsproplem7 28061 mulsproplem8 28062 |
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