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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 10213 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶)) | |
2 | reldom 8976 | . . . . 5 ⊢ Rel ≼ | |
3 | 2 | brrelex1i 5738 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ∈ V) |
4 | djucomen 10208 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴)) | |
5 | 3, 4 | sylan 578 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴)) |
6 | 2 | brrelex2i 5739 | . . . 4 ⊢ (𝐴 ≼ 𝐵 → 𝐵 ∈ V) |
7 | djucomen 10208 | . . . 4 ⊢ ((𝐵 ∈ V ∧ 𝐶 ∈ 𝑉) → (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) | |
8 | 6, 7 | sylan 578 | . . 3 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) |
9 | domen1 9150 | . . . 4 ⊢ ((𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐵 ⊔ 𝐶))) | |
10 | domen2 9151 | . . . 4 ⊢ ((𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵) → ((𝐶 ⊔ 𝐴) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) | |
11 | 9, 10 | sylan9bb 508 | . . 3 ⊢ (((𝐴 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐴) ∧ (𝐵 ⊔ 𝐶) ≈ (𝐶 ⊔ 𝐵)) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) |
12 | 5, 8, 11 | syl2anc 582 | . 2 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → ((𝐴 ⊔ 𝐶) ≼ (𝐵 ⊔ 𝐶) ↔ (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵))) |
13 | 1, 12 | mpbid 231 | 1 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐶 ∈ 𝑉) → (𝐶 ⊔ 𝐴) ≼ (𝐶 ⊔ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∈ wcel 2098 Vcvv 3473 class class class wbr 5152 ≈ cen 8967 ≼ cdom 8968 ⊔ cdju 9929 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2699 ax-sep 5303 ax-nul 5310 ax-pow 5369 ax-pr 5433 ax-un 7746 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-ral 3059 df-rex 3068 df-rab 3431 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4327 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-op 4639 df-uni 4913 df-int 4954 df-br 5153 df-opab 5215 df-mpt 5236 df-tr 5270 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-ord 6377 df-on 6378 df-suc 6380 df-iota 6505 df-fun 6555 df-fn 6556 df-f 6557 df-f1 6558 df-fo 6559 df-f1o 6560 df-fv 6561 df-1st 7999 df-2nd 8000 df-1o 8493 df-er 8731 df-en 8971 df-dom 8972 df-dju 9932 |
This theorem is referenced by: djulepw 10223 unctb 10236 infdjuabs 10237 infdju 10239 infdif 10240 fin45 10423 canthp1 10685 pwdjundom 10698 gchdjuidm 10699 gchpwdom 10701 gchhar 10710 pr2dom 42988 tr3dom 42989 |
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