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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 10185 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶)) | |
| 2 | reldom 8958 | . . . . 5 ⊢ Rel ≼ | |
| 3 | 2 | brrelex1i 5711 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ∈ V) |
| 4 | djucomen 10180 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴)) | |
| 5 | 3, 4 | sylan 592 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴)) |
| 6 | 2 | brrelex2i 5712 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐵 ∈ V) |
| 7 | djucomen 10180 | . . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) | |
| 8 | 6, 7 | sylan 592 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) |
| 9 | domen1 9117 | . . . 4 ⊢ ((𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐵 ⊔ 𝐶))) | |
| 10 | domen2 9118 | . . . 4 ⊢ ((𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵) → ((𝐶 ⊔ 𝐴) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) | |
| 11 | 9, 10 | sylan9bb 519 | . . 3 ⊢ (((𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴) ∧ (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) |
| 12 | 5, 8, 11 | syl2anc 596 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) |
| 13 | 1, 12 | mpbid 235 | 1 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2145 Vcvv 3450 class class class wbr 5103 ≈ cen 8949 ≼ cdom 8950 ⊔ cdju 9903 |
| 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-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 |
| 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-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-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-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-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-1st 7986 df-2nd 7987 df-1o 8455 df-er 8696 df-en 8953 df-dom 8954 df-dju 9906 |
| This theorem is used by: djulepw 10195 unctb 10206 infdjuabs 10207 infdju 10209 infdif 10210 fin45 10394 canthp1 10663 pwdjundom 10676 gchdjuidm 10677 gchpwdom 10679 gchhar 10688 pr2dom 44367 tr3dom 44368 |
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