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| Mirrors > Home > MPE Home > Th. List > naddel12 | Structured version Visualization version GIF version | ||
| Description: Natural addition to both sides of ordinal less-than. (Contributed by Scott Fenton, 7-Feb-2025.) |
| Ref | Expression |
|---|---|
| naddel12 | ⊢ ((𝐶 ∈ On ∧ 𝐷 ∈ On) → ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴 +no 𝐵) ∈ (𝐶 +no 𝐷))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simprr 785 | . . . 4 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → 𝐵 ∈ 𝐷) | |
| 2 | onelon 6382 | . . . . . 6 ⊢ ((𝐷 ∈ On ∧ 𝐵 ∈ 𝐷) → 𝐵 ∈ On) | |
| 3 | 2 | ad2ant2l 759 | . . . . 5 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → 𝐵 ∈ On) |
| 4 | simplr 781 | . . . . 5 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → 𝐷 ∈ On) | |
| 5 | onelon 6382 | . . . . . 6 ⊢ ((𝐶 ∈ On ∧ 𝐴 ∈ 𝐶) → 𝐴 ∈ On) | |
| 6 | 5 | ad2ant2r 760 | . . . . 5 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → 𝐴 ∈ On) |
| 7 | naddel2 8680 | . . . . 5 ⊢ ((𝐵 ∈ On ∧ 𝐷 ∈ On ∧ 𝐴 ∈ On) → (𝐵 ∈ 𝐷 ↔ (𝐴 +no 𝐵) ∈ (𝐴 +no 𝐷))) | |
| 8 | 3, 4, 6, 7 | syl3anc 1398 | . . . 4 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (𝐵 ∈ 𝐷 ↔ (𝐴 +no 𝐵) ∈ (𝐴 +no 𝐷))) |
| 9 | 1, 8 | mpbid 235 | . . 3 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (𝐴 +no 𝐵) ∈ (𝐴 +no 𝐷)) |
| 10 | simprl 783 | . . . 4 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → 𝐴 ∈ 𝐶) | |
| 11 | simpll 779 | . . . . 5 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → 𝐶 ∈ On) | |
| 12 | naddel1 8679 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ 𝐶 ∈ On ∧ 𝐷 ∈ On) → (𝐴 ∈ 𝐶 ↔ (𝐴 +no 𝐷) ∈ (𝐶 +no 𝐷))) | |
| 13 | 6, 11, 4, 12 | syl3anc 1398 | . . . 4 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (𝐴 ∈ 𝐶 ↔ (𝐴 +no 𝐷) ∈ (𝐶 +no 𝐷))) |
| 14 | 10, 13 | mpbid 235 | . . 3 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (𝐴 +no 𝐷) ∈ (𝐶 +no 𝐷)) |
| 15 | naddcl 8668 | . . . . 5 ⊢ ((𝐶 ∈ On ∧ 𝐷 ∈ On) → (𝐶 +no 𝐷) ∈ On) | |
| 16 | 15 | adantr 486 | . . . 4 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (𝐶 +no 𝐷) ∈ On) |
| 17 | ontr1 6405 | . . . 4 ⊢ ((𝐶 +no 𝐷) ∈ On → (((𝐴 +no 𝐵) ∈ (𝐴 +no 𝐷) ∧ (𝐴 +no 𝐷) ∈ (𝐶 +no 𝐷)) → (𝐴 +no 𝐵) ∈ (𝐶 +no 𝐷))) | |
| 18 | 16, 17 | syl 18 | . . 3 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (((𝐴 +no 𝐵) ∈ (𝐴 +no 𝐷) ∧ (𝐴 +no 𝐷) ∈ (𝐶 +no 𝐷)) → (𝐴 +no 𝐵) ∈ (𝐶 +no 𝐷))) |
| 19 | 9, 14, 18 | mp2and 712 | . 2 ⊢ (((𝐶 ∈ On ∧ 𝐷 ∈ On) ∧ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) → (𝐴 +no 𝐵) ∈ (𝐶 +no 𝐷)) |
| 20 | 19 | ex 418 | 1 ⊢ ((𝐶 ∈ On ∧ 𝐷 ∈ On) → ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴 +no 𝐵) ∈ (𝐶 +no 𝐷))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2145 Oncon0 6357 (class class class)co 7414 +no cnadd 8656 |
| 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 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 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 6299 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7987 df-2nd 7988 df-frecs 8281 df-nadd 8657 |
| This theorem is used by: mulsproplem4 28387 mulsproplem5 28388 mulsproplem6 28389 mulsproplem7 28390 mulsproplem8 28391 |
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