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Mirrors > Home > MPE Home > Th. List > alephdom | Structured version Visualization version GIF version |
Description: Relationship between inclusion of ordinal numbers and dominance of infinite initial ordinals. (Contributed by Jeff Hankins, 23-Oct-2009.) |
Ref | Expression |
---|---|
alephdom | ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ⊆ 𝐵 ↔ (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | onsseleq 6402 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ⊆ 𝐵 ↔ (𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵))) | |
2 | alephord 10066 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 ↔ (ℵ‘𝐴) ≺ (ℵ‘𝐵))) | |
3 | sdomdom 8972 | . . . . 5 ⊢ ((ℵ‘𝐴) ≺ (ℵ‘𝐵) → (ℵ‘𝐴) ≼ (ℵ‘𝐵)) | |
4 | 2, 3 | syl6bi 252 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 → (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
5 | fvex 6901 | . . . . . . 7 ⊢ (ℵ‘𝐴) ∈ V | |
6 | fveq2 6888 | . . . . . . 7 ⊢ (𝐴 = 𝐵 → (ℵ‘𝐴) = (ℵ‘𝐵)) | |
7 | eqeng 8978 | . . . . . . 7 ⊢ ((ℵ‘𝐴) ∈ V → ((ℵ‘𝐴) = (ℵ‘𝐵) → (ℵ‘𝐴) ≈ (ℵ‘𝐵))) | |
8 | 5, 6, 7 | mpsyl 68 | . . . . . 6 ⊢ (𝐴 = 𝐵 → (ℵ‘𝐴) ≈ (ℵ‘𝐵)) |
9 | 8 | a1i 11 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 = 𝐵 → (ℵ‘𝐴) ≈ (ℵ‘𝐵))) |
10 | endom 8971 | . . . . 5 ⊢ ((ℵ‘𝐴) ≈ (ℵ‘𝐵) → (ℵ‘𝐴) ≼ (ℵ‘𝐵)) | |
11 | 9, 10 | syl6 35 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 = 𝐵 → (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
12 | 4, 11 | jaod 857 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((𝐴 ∈ 𝐵 ∨ 𝐴 = 𝐵) → (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
13 | 1, 12 | sylbid 239 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ⊆ 𝐵 → (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
14 | eloni 6371 | . . . . . 6 ⊢ (𝐵 ∈ On → Ord 𝐵) | |
15 | eloni 6371 | . . . . . 6 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
16 | ordtri2or 6459 | . . . . . 6 ⊢ ((Ord 𝐵 ∧ Ord 𝐴) → (𝐵 ∈ 𝐴 ∨ 𝐴 ⊆ 𝐵)) | |
17 | 14, 15, 16 | syl2anr 597 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ∈ 𝐴 ∨ 𝐴 ⊆ 𝐵)) |
18 | 17 | ord 862 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐵 ∈ 𝐴 → 𝐴 ⊆ 𝐵)) |
19 | 18 | con1d 145 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ⊆ 𝐵 → 𝐵 ∈ 𝐴)) |
20 | alephord 10066 | . . . . 5 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On) → (𝐵 ∈ 𝐴 ↔ (ℵ‘𝐵) ≺ (ℵ‘𝐴))) | |
21 | 20 | ancoms 459 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ∈ 𝐴 ↔ (ℵ‘𝐵) ≺ (ℵ‘𝐴))) |
22 | sdomnen 8973 | . . . . 5 ⊢ ((ℵ‘𝐵) ≺ (ℵ‘𝐴) → ¬ (ℵ‘𝐵) ≈ (ℵ‘𝐴)) | |
23 | sdomdom 8972 | . . . . . 6 ⊢ ((ℵ‘𝐵) ≺ (ℵ‘𝐴) → (ℵ‘𝐵) ≼ (ℵ‘𝐴)) | |
24 | sbth 9089 | . . . . . . 7 ⊢ (((ℵ‘𝐵) ≼ (ℵ‘𝐴) ∧ (ℵ‘𝐴) ≼ (ℵ‘𝐵)) → (ℵ‘𝐵) ≈ (ℵ‘𝐴)) | |
25 | 24 | ex 413 | . . . . . 6 ⊢ ((ℵ‘𝐵) ≼ (ℵ‘𝐴) → ((ℵ‘𝐴) ≼ (ℵ‘𝐵) → (ℵ‘𝐵) ≈ (ℵ‘𝐴))) |
26 | 23, 25 | syl 17 | . . . . 5 ⊢ ((ℵ‘𝐵) ≺ (ℵ‘𝐴) → ((ℵ‘𝐴) ≼ (ℵ‘𝐵) → (ℵ‘𝐵) ≈ (ℵ‘𝐴))) |
27 | 22, 26 | mtod 197 | . . . 4 ⊢ ((ℵ‘𝐵) ≺ (ℵ‘𝐴) → ¬ (ℵ‘𝐴) ≼ (ℵ‘𝐵)) |
28 | 21, 27 | syl6bi 252 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ∈ 𝐴 → ¬ (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
29 | 19, 28 | syld 47 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐴 ⊆ 𝐵 → ¬ (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
30 | 13, 29 | impcon4bid 226 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ⊆ 𝐵 ↔ (ℵ‘𝐴) ≼ (ℵ‘𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∨ wo 845 = wceq 1541 ∈ wcel 2106 Vcvv 3474 ⊆ wss 3947 class class class wbr 5147 Ord word 6360 Oncon0 6361 ‘cfv 6540 ≈ cen 8932 ≼ cdom 8933 ≺ csdm 8934 ℵcale 9927 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-inf2 9632 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-om 7852 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-en 8936 df-dom 8937 df-sdom 8938 df-oi 9501 df-har 9548 df-card 9930 df-aleph 9931 |
This theorem is referenced by: (None) |
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