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Mirrors > Home > MPE Home > Th. List > alephdom2 | Structured version Visualization version GIF version |
Description: A dominated initial ordinal is included. (Contributed by Jeff Hankins, 24-Oct-2009.) |
Ref | Expression |
---|---|
alephdom2 | ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((ℵ‘𝐴) ⊆ 𝐵 ↔ (ℵ‘𝐴) ≼ 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | alephsdom 9841 | . . . 4 ⊢ ((𝐵 ∈ On ∧ 𝐴 ∈ On) → (𝐵 ∈ (ℵ‘𝐴) ↔ 𝐵 ≺ (ℵ‘𝐴))) | |
2 | 1 | ancoms 459 | . . 3 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐵 ∈ (ℵ‘𝐴) ↔ 𝐵 ≺ (ℵ‘𝐴))) |
3 | 2 | notbid 318 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (¬ 𝐵 ∈ (ℵ‘𝐴) ↔ ¬ 𝐵 ≺ (ℵ‘𝐴))) |
4 | alephon 9824 | . . . . 5 ⊢ (ℵ‘𝐴) ∈ On | |
5 | 4 | onordi 6369 | . . . 4 ⊢ Ord (ℵ‘𝐴) |
6 | eloni 6274 | . . . 4 ⊢ (𝐵 ∈ On → Ord 𝐵) | |
7 | ordtri1 6297 | . . . 4 ⊢ ((Ord (ℵ‘𝐴) ∧ Ord 𝐵) → ((ℵ‘𝐴) ⊆ 𝐵 ↔ ¬ 𝐵 ∈ (ℵ‘𝐴))) | |
8 | 5, 6, 7 | sylancr 587 | . . 3 ⊢ (𝐵 ∈ On → ((ℵ‘𝐴) ⊆ 𝐵 ↔ ¬ 𝐵 ∈ (ℵ‘𝐴))) |
9 | 8 | adantl 482 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((ℵ‘𝐴) ⊆ 𝐵 ↔ ¬ 𝐵 ∈ (ℵ‘𝐴))) |
10 | domtriord 8890 | . . . 4 ⊢ (((ℵ‘𝐴) ∈ On ∧ 𝐵 ∈ On) → ((ℵ‘𝐴) ≼ 𝐵 ↔ ¬ 𝐵 ≺ (ℵ‘𝐴))) | |
11 | 4, 10 | mpan 687 | . . 3 ⊢ (𝐵 ∈ On → ((ℵ‘𝐴) ≼ 𝐵 ↔ ¬ 𝐵 ≺ (ℵ‘𝐴))) |
12 | 11 | adantl 482 | . 2 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((ℵ‘𝐴) ≼ 𝐵 ↔ ¬ 𝐵 ≺ (ℵ‘𝐴))) |
13 | 3, 9, 12 | 3bitr4d 311 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → ((ℵ‘𝐴) ⊆ 𝐵 ↔ (ℵ‘𝐴) ≼ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∈ wcel 2110 ⊆ wss 3892 class class class wbr 5079 Ord word 6263 Oncon0 6264 ‘cfv 6431 ≼ cdom 8712 ≺ csdm 8713 ℵcale 9693 |
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 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-rep 5214 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7580 ax-inf2 9375 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-ral 3071 df-rex 3072 df-reu 3073 df-rmo 3074 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-int 4886 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6200 df-ord 6267 df-on 6268 df-lim 6269 df-suc 6270 df-iota 6389 df-fun 6433 df-fn 6434 df-f 6435 df-f1 6436 df-fo 6437 df-f1o 6438 df-fv 6439 df-isom 6440 df-riota 7226 df-ov 7272 df-om 7705 df-2nd 7823 df-frecs 8086 df-wrecs 8117 df-recs 8191 df-rdg 8230 df-1o 8286 df-er 8479 df-en 8715 df-dom 8716 df-sdom 8717 df-fin 8718 df-oi 9245 df-har 9292 df-card 9696 df-aleph 9697 |
This theorem is referenced by: (None) |
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