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Mirrors > Home > MPE Home > Th. List > nnadjuALT | Structured version Visualization version GIF version |
Description: Shorter proof of nnadju 9642 using ax-rep 5149. (Contributed by Paul Chapman, 11-Apr-2009.) (Revised by Mario Carneiro, 6-Feb-2013.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
nnadjuALT | ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (card‘(𝐴 ⊔ 𝐵)) = (𝐴 +o 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnon 7578 | . . . 4 ⊢ (𝐴 ∈ ω → 𝐴 ∈ On) | |
2 | nnon 7578 | . . . 4 ⊢ (𝐵 ∈ ω → 𝐵 ∈ On) | |
3 | onadju 9638 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 +o 𝐵) ≈ (𝐴 ⊔ 𝐵)) | |
4 | 1, 2, 3 | syl2an 599 | . . 3 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴 +o 𝐵) ≈ (𝐴 ⊔ 𝐵)) |
5 | carden2b 9414 | . . 3 ⊢ ((𝐴 +o 𝐵) ≈ (𝐴 ⊔ 𝐵) → (card‘(𝐴 +o 𝐵)) = (card‘(𝐴 ⊔ 𝐵))) | |
6 | 4, 5 | syl 17 | . 2 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (card‘(𝐴 +o 𝐵)) = (card‘(𝐴 ⊔ 𝐵))) |
7 | nnacl 8240 | . . 3 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (𝐴 +o 𝐵) ∈ ω) | |
8 | cardnn 9410 | . . 3 ⊢ ((𝐴 +o 𝐵) ∈ ω → (card‘(𝐴 +o 𝐵)) = (𝐴 +o 𝐵)) | |
9 | 7, 8 | syl 17 | . 2 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (card‘(𝐴 +o 𝐵)) = (𝐴 +o 𝐵)) |
10 | 6, 9 | eqtr3d 2796 | 1 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω) → (card‘(𝐴 ⊔ 𝐵)) = (𝐴 +o 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 400 = wceq 1539 ∈ wcel 2112 class class class wbr 5025 Oncon0 6162 ‘cfv 6328 (class class class)co 7143 ωcom 7572 +o coa 8102 ≈ cen 8517 ⊔ cdju 9345 cardccrd 9382 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1912 ax-6 1971 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2159 ax-12 2176 ax-ext 2730 ax-rep 5149 ax-sep 5162 ax-nul 5169 ax-pow 5227 ax-pr 5291 ax-un 7452 |
This theorem depends on definitions: df-bi 210 df-an 401 df-or 846 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2071 df-mo 2558 df-eu 2589 df-clab 2737 df-cleq 2751 df-clel 2831 df-nfc 2899 df-ne 2950 df-ral 3073 df-rex 3074 df-reu 3075 df-rmo 3076 df-rab 3077 df-v 3409 df-sbc 3694 df-csb 3802 df-dif 3857 df-un 3859 df-in 3861 df-ss 3871 df-pss 3873 df-nul 4222 df-if 4414 df-pw 4489 df-sn 4516 df-pr 4518 df-tp 4520 df-op 4522 df-uni 4792 df-int 4832 df-iun 4878 df-br 5026 df-opab 5088 df-mpt 5106 df-tr 5132 df-id 5423 df-eprel 5428 df-po 5436 df-so 5437 df-fr 5476 df-we 5478 df-xp 5523 df-rel 5524 df-cnv 5525 df-co 5526 df-dm 5527 df-rn 5528 df-res 5529 df-ima 5530 df-pred 6119 df-ord 6165 df-on 6166 df-lim 6167 df-suc 6168 df-iota 6287 df-fun 6330 df-fn 6331 df-f 6332 df-f1 6333 df-fo 6334 df-f1o 6335 df-fv 6336 df-ov 7146 df-oprab 7147 df-mpo 7148 df-om 7573 df-1st 7686 df-2nd 7687 df-wrecs 7950 df-recs 8011 df-rdg 8049 df-1o 8105 df-oadd 8109 df-er 8292 df-en 8521 df-dom 8522 df-sdom 8523 df-fin 8524 df-dju 9348 df-card 9386 |
This theorem is referenced by: (None) |
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