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Mirrors > Home > MPE Home > Th. List > alephgeom | Structured version Visualization version GIF version |
Description: Every aleph is greater than or equal to the set of natural numbers. (Contributed by NM, 11-Nov-2003.) |
Ref | Expression |
---|---|
alephgeom | ⊢ (𝐴 ∈ On ↔ ω ⊆ (ℵ‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | aleph0 9645 | . . 3 ⊢ (ℵ‘∅) = ω | |
2 | 0ss 4297 | . . . 4 ⊢ ∅ ⊆ 𝐴 | |
3 | 0elon 6244 | . . . . 5 ⊢ ∅ ∈ On | |
4 | alephord3 9657 | . . . . 5 ⊢ ((∅ ∈ On ∧ 𝐴 ∈ On) → (∅ ⊆ 𝐴 ↔ (ℵ‘∅) ⊆ (ℵ‘𝐴))) | |
5 | 3, 4 | mpan 690 | . . . 4 ⊢ (𝐴 ∈ On → (∅ ⊆ 𝐴 ↔ (ℵ‘∅) ⊆ (ℵ‘𝐴))) |
6 | 2, 5 | mpbii 236 | . . 3 ⊢ (𝐴 ∈ On → (ℵ‘∅) ⊆ (ℵ‘𝐴)) |
7 | 1, 6 | eqsstrrid 3936 | . 2 ⊢ (𝐴 ∈ On → ω ⊆ (ℵ‘𝐴)) |
8 | peano1 7645 | . . . . . 6 ⊢ ∅ ∈ ω | |
9 | ordom 7632 | . . . . . . . 8 ⊢ Ord ω | |
10 | ord0 6243 | . . . . . . . 8 ⊢ Ord ∅ | |
11 | ordtri1 6224 | . . . . . . . 8 ⊢ ((Ord ω ∧ Ord ∅) → (ω ⊆ ∅ ↔ ¬ ∅ ∈ ω)) | |
12 | 9, 10, 11 | mp2an 692 | . . . . . . 7 ⊢ (ω ⊆ ∅ ↔ ¬ ∅ ∈ ω) |
13 | 12 | con2bii 361 | . . . . . 6 ⊢ (∅ ∈ ω ↔ ¬ ω ⊆ ∅) |
14 | 8, 13 | mpbi 233 | . . . . 5 ⊢ ¬ ω ⊆ ∅ |
15 | ndmfv 6725 | . . . . . 6 ⊢ (¬ 𝐴 ∈ dom ℵ → (ℵ‘𝐴) = ∅) | |
16 | 15 | sseq2d 3919 | . . . . 5 ⊢ (¬ 𝐴 ∈ dom ℵ → (ω ⊆ (ℵ‘𝐴) ↔ ω ⊆ ∅)) |
17 | 14, 16 | mtbiri 330 | . . . 4 ⊢ (¬ 𝐴 ∈ dom ℵ → ¬ ω ⊆ (ℵ‘𝐴)) |
18 | 17 | con4i 114 | . . 3 ⊢ (ω ⊆ (ℵ‘𝐴) → 𝐴 ∈ dom ℵ) |
19 | alephfnon 9644 | . . . 4 ⊢ ℵ Fn On | |
20 | 19 | fndmi 6460 | . . 3 ⊢ dom ℵ = On |
21 | 18, 20 | eleqtrdi 2841 | . 2 ⊢ (ω ⊆ (ℵ‘𝐴) → 𝐴 ∈ On) |
22 | 7, 21 | impbii 212 | 1 ⊢ (𝐴 ∈ On ↔ ω ⊆ (ℵ‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 209 ∈ wcel 2112 ⊆ wss 3853 ∅c0 4223 dom cdm 5536 Ord word 6190 Oncon0 6191 ‘cfv 6358 ωcom 7622 ℵcale 9517 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-inf2 9234 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-int 4846 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-se 5495 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-isom 6367 df-riota 7148 df-om 7623 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-er 8369 df-en 8605 df-dom 8606 df-sdom 8607 df-fin 8608 df-oi 9104 df-har 9151 df-card 9520 df-aleph 9521 |
This theorem is referenced by: alephislim 9662 cardalephex 9669 isinfcard 9671 alephval3 9689 alephval2 10151 alephadd 10156 alephmul 10157 alephexp1 10158 alephsuc3 10159 alephexp2 10160 alephreg 10161 pwcfsdom 10162 cfpwsdom 10163 gchaleph 10250 gchaleph2 10251 |
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