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| Mirrors > Home > MPE Home > Th. List > djudom2 | Structured version Visualization version GIF version | ||
| Description: Ordering law for cardinal addition. Theorem 6L(a) of [Enderton] p. 149. (Contributed by NM, 28-Sep-2004.) (Revised by Mario Carneiro, 29-Apr-2015.) |
| Ref | Expression |
|---|---|
| djudom2 | ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | djudom1 10096 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶)) | |
| 2 | reldom 8889 | . . . . 5 ⊢ Rel ≼ | |
| 3 | 2 | brrelex1i 5674 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ∈ V) |
| 4 | djucomen 10091 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴)) | |
| 5 | 3, 4 | sylan 586 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴)) |
| 6 | 2 | brrelex2i 5675 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐵 ∈ V) |
| 7 | djucomen 10091 | . . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) | |
| 8 | 6, 7 | sylan 586 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) |
| 9 | domen1 9047 | . . . 4 ⊢ ((𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐵 ⊔ 𝐶))) | |
| 10 | domen2 9048 | . . . 4 ⊢ ((𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵) → ((𝐶 ⊔ 𝐴) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) | |
| 11 | 9, 10 | sylan9bb 514 | . . 3 ⊢ (((𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴) ∧ (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) |
| 12 | 5, 8, 11 | syl2anc 590 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) |
| 13 | 1, 12 | mpbid 233 | 1 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 ∈ wcel 2119 Vcvv 3431 class class class wbr 5072 ≈ cen 8880 ≼ cdom 8881 ⊔ cdju 9813 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-int 4878 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-ord 6313 df-on 6314 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-1st 7931 df-2nd 7932 df-1o 8395 df-er 8633 df-en 8884 df-dom 8885 df-dju 9816 |
| This theorem is referenced by: djulepw 10106 unctb 10117 infdjuabs 10118 infdju 10120 infdif 10121 fin45 10305 canthp1 10568 pwdjundom 10581 gchdjuidm 10582 gchpwdom 10584 gchhar 10593 pr2dom 43971 tr3dom 43972 |
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