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Mirrors > Home > MPE Home > Th. List > gchaleph2 | Structured version Visualization version GIF version |
Description: If (ℵ‘𝐴) and (ℵ‘suc 𝐴) are GCH-sets, then the successor aleph (ℵ‘suc 𝐴) is equinumerous to the powerset of (ℵ‘𝐴). (Contributed by Mario Carneiro, 31-May-2015.) |
Ref | Expression |
---|---|
gchaleph2 | ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘suc 𝐴) ≈ 𝒫 (ℵ‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | harcl 8349 | . . 3 ⊢ (har‘(ℵ‘𝐴)) ∈ On | |
2 | alephon 8775 | . . . . 5 ⊢ (ℵ‘𝐴) ∈ On | |
3 | onenon 8658 | . . . . 5 ⊢ ((ℵ‘𝐴) ∈ On → (ℵ‘𝐴) ∈ dom card) | |
4 | harsdom 8704 | . . . . 5 ⊢ ((ℵ‘𝐴) ∈ dom card → (ℵ‘𝐴) ≺ (har‘(ℵ‘𝐴))) | |
5 | 2, 3, 4 | mp2b 10 | . . . 4 ⊢ (ℵ‘𝐴) ≺ (har‘(ℵ‘𝐴)) |
6 | simp1 1054 | . . . . . . 7 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → 𝐴 ∈ On) | |
7 | alephgeom 8788 | . . . . . . 7 ⊢ (𝐴 ∈ On ↔ ω ⊆ (ℵ‘𝐴)) | |
8 | 6, 7 | sylib 207 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → ω ⊆ (ℵ‘𝐴)) |
9 | ssdomg 7887 | . . . . . 6 ⊢ ((ℵ‘𝐴) ∈ On → (ω ⊆ (ℵ‘𝐴) → ω ≼ (ℵ‘𝐴))) | |
10 | 2, 8, 9 | mpsyl 66 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → ω ≼ (ℵ‘𝐴)) |
11 | simp2 1055 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘𝐴) ∈ GCH) | |
12 | alephsuc 8774 | . . . . . . 7 ⊢ (𝐴 ∈ On → (ℵ‘suc 𝐴) = (har‘(ℵ‘𝐴))) | |
13 | 6, 12 | syl 17 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘suc 𝐴) = (har‘(ℵ‘𝐴))) |
14 | simp3 1056 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘suc 𝐴) ∈ GCH) | |
15 | 13, 14 | eqeltrrd 2689 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (har‘(ℵ‘𝐴)) ∈ GCH) |
16 | gchpwdom 9371 | . . . . 5 ⊢ ((ω ≼ (ℵ‘𝐴) ∧ (ℵ‘𝐴) ∈ GCH ∧ (har‘(ℵ‘𝐴)) ∈ GCH) → ((ℵ‘𝐴) ≺ (har‘(ℵ‘𝐴)) ↔ 𝒫 (ℵ‘𝐴) ≼ (har‘(ℵ‘𝐴)))) | |
17 | 10, 11, 15, 16 | syl3anc 1318 | . . . 4 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → ((ℵ‘𝐴) ≺ (har‘(ℵ‘𝐴)) ↔ 𝒫 (ℵ‘𝐴) ≼ (har‘(ℵ‘𝐴)))) |
18 | 5, 17 | mpbii 222 | . . 3 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → 𝒫 (ℵ‘𝐴) ≼ (har‘(ℵ‘𝐴))) |
19 | ondomen 8743 | . . 3 ⊢ (((har‘(ℵ‘𝐴)) ∈ On ∧ 𝒫 (ℵ‘𝐴) ≼ (har‘(ℵ‘𝐴))) → 𝒫 (ℵ‘𝐴) ∈ dom card) | |
20 | 1, 18, 19 | sylancr 694 | . 2 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → 𝒫 (ℵ‘𝐴) ∈ dom card) |
21 | gchaleph 9372 | . 2 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ 𝒫 (ℵ‘𝐴) ∈ dom card) → (ℵ‘suc 𝐴) ≈ 𝒫 (ℵ‘𝐴)) | |
22 | 20, 21 | syld3an3 1363 | 1 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘suc 𝐴) ≈ 𝒫 (ℵ‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ⊆ wss 3540 𝒫 cpw 4108 class class class wbr 4583 dom cdm 5038 Oncon0 5640 suc csuc 5642 ‘cfv 5804 ωcom 6957 ≈ cen 7838 ≼ cdom 7839 ≺ csdm 7840 harchar 8344 cardccrd 8644 ℵcale 8645 GCHcgch 9321 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-supp 7183 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-seqom 7430 df-1o 7447 df-2o 7448 df-oadd 7451 df-omul 7452 df-oexp 7453 df-er 7629 df-map 7746 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-fsupp 8159 df-oi 8298 df-har 8346 df-wdom 8347 df-cnf 8442 df-card 8648 df-aleph 8649 df-cda 8873 df-fin4 8992 df-gch 9322 |
This theorem is referenced by: gch2 9376 gch3 9377 |
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