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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 9318 | . . 3 ⊢ (har‘(ℵ‘𝐴)) ∈ On | |
2 | alephon 9825 | . . . . 5 ⊢ (ℵ‘𝐴) ∈ On | |
3 | onenon 9707 | . . . . 5 ⊢ ((ℵ‘𝐴) ∈ On → (ℵ‘𝐴) ∈ dom card) | |
4 | harsdom 9753 | . . . . 5 ⊢ ((ℵ‘𝐴) ∈ dom card → (ℵ‘𝐴) ≺ (har‘(ℵ‘𝐴))) | |
5 | 2, 3, 4 | mp2b 10 | . . . 4 ⊢ (ℵ‘𝐴) ≺ (har‘(ℵ‘𝐴)) |
6 | simp1 1135 | . . . . . . 7 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → 𝐴 ∈ On) | |
7 | alephgeom 9838 | . . . . . . 7 ⊢ (𝐴 ∈ On ↔ ω ⊆ (ℵ‘𝐴)) | |
8 | 6, 7 | sylib 217 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → ω ⊆ (ℵ‘𝐴)) |
9 | ssdomg 8786 | . . . . . 6 ⊢ ((ℵ‘𝐴) ∈ On → (ω ⊆ (ℵ‘𝐴) → ω ≼ (ℵ‘𝐴))) | |
10 | 2, 8, 9 | mpsyl 68 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → ω ≼ (ℵ‘𝐴)) |
11 | simp2 1136 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘𝐴) ∈ GCH) | |
12 | alephsuc 9824 | . . . . . . 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 1137 | . . . . . 6 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (ℵ‘suc 𝐴) ∈ GCH) | |
15 | 13, 14 | eqeltrrd 2840 | . . . . 5 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → (har‘(ℵ‘𝐴)) ∈ GCH) |
16 | gchpwdom 10426 | . . . . 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 1370 | . . . 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 232 | . . 3 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → 𝒫 (ℵ‘𝐴) ≼ (har‘(ℵ‘𝐴))) |
19 | ondomen 9793 | . . 3 ⊢ (((har‘(ℵ‘𝐴)) ∈ On ∧ 𝒫 (ℵ‘𝐴) ≼ (har‘(ℵ‘𝐴))) → 𝒫 (ℵ‘𝐴) ∈ dom card) | |
20 | 1, 18, 19 | sylancr 587 | . 2 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ (ℵ‘suc 𝐴) ∈ GCH) → 𝒫 (ℵ‘𝐴) ∈ dom card) |
21 | gchaleph 10427 | . 2 ⊢ ((𝐴 ∈ On ∧ (ℵ‘𝐴) ∈ GCH ∧ 𝒫 (ℵ‘𝐴) ∈ dom card) → (ℵ‘suc 𝐴) ≈ 𝒫 (ℵ‘𝐴)) | |
22 | 20, 21 | syld3an3 1408 | 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 205 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ⊆ wss 3887 𝒫 cpw 4533 class class class wbr 5074 dom cdm 5589 Oncon0 6266 suc csuc 6268 ‘cfv 6433 ωcom 7712 ≈ cen 8730 ≼ cdom 8731 ≺ csdm 8732 harchar 9315 cardccrd 9693 ℵcale 9694 GCHcgch 10376 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 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 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-supp 7978 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-seqom 8279 df-1o 8297 df-2o 8298 df-oadd 8301 df-omul 8302 df-oexp 8303 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-fsupp 9129 df-oi 9269 df-har 9316 df-wdom 9324 df-cnf 9420 df-dju 9659 df-card 9697 df-aleph 9698 df-fin4 10043 df-gch 10377 |
This theorem is referenced by: gch2 10431 gch3 10432 |
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