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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 8710 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ∈ 𝐵 → (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) | |
| 2 | naddssim 8709 | . . . 4 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ⊆ 𝐴 → (𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶))) | |
| 3 | 2 | 3com12 1141 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ⊆ 𝐴 → (𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶))) |
| 4 | ontri1 6404 | . . . . 5 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) | |
| 5 | 4 | ancoms 464 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) |
| 6 | 5 | 3adant3 1150 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 ⊆ 𝐴 ↔ ¬ 𝐴 ∈ 𝐵)) |
| 7 | naddcl 8700 | . . . . 5 ⊢ ((𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 +no 𝐶) ∈ On) | |
| 8 | 7 | 3adant1 1148 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐵 +no 𝐶) ∈ On) |
| 9 | naddcl 8700 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐶 ∈ On) → (𝐴 +no 𝐶) ∈ On) | |
| 10 | ontri1 6404 | . . . 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 1364 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → ((𝐵 +no 𝐶) ⊆ (𝐴 +no 𝐶) ↔ ¬ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| 12 | 3, 6, 11 | 3imtr3d 296 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (¬ 𝐴 ∈ 𝐵 → ¬ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| 13 | 1, 12 | impcon4bid 230 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On ∧ 𝐶 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 +no 𝐶) ∈ (𝐵 +no 𝐶))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ w3a 1103 ∈ wcel 2146 ⊆ wss 3900 Oncon0 6369 (class class class)co 7430 +no cnadd 8688 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7433 df-oprab 7434 df-mpo 7435 df-1st 8011 df-2nd 8012 df-frecs 8313 df-nadd 8689 |
| This theorem is used by: naddel2 8712 naddss1 8713 naddel12 8724 addsproplem2 28371 mulsproplem2 28518 mulsproplem5 28521 mulsproplem6 28522 mulsproplem7 28523 mulsproplem8 28524 ltnmul 37095 ltnadd 37097 nadddilem1 37099 nadddilem3 37101 |
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