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| Mirrors > Home > MPE Home > Th. List > alephsson | Structured version Visualization version GIF version | ||
| Description: The class of transfinite cardinals (the range of the aleph function) is a subclass of the class of ordinal numbers. (Contributed by NM, 11-Nov-2003.) |
| Ref | Expression |
|---|---|
| alephsson | ⊢ ran ℵ ⊆ On |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isinfcard 10003 | . . 3 ⊢ ((ω ⊆ 𝑥 ∧ (card‘𝑥) = 𝑥) ↔ 𝑥 ∈ ran ℵ) | |
| 2 | cardon 9857 | . . . . 5 ⊢ (card‘𝑥) ∈ On | |
| 3 | eleq1 2823 | . . . . 5 ⊢ ((card‘𝑥) = 𝑥 → ((card‘𝑥) ∈ On ↔ 𝑥 ∈ On)) | |
| 4 | 2, 3 | mpbii 233 | . . . 4 ⊢ ((card‘𝑥) = 𝑥 → 𝑥 ∈ On) |
| 5 | 4 | adantl 481 | . . 3 ⊢ ((ω ⊆ 𝑥 ∧ (card‘𝑥) = 𝑥) → 𝑥 ∈ On) |
| 6 | 1, 5 | sylbir 235 | . 2 ⊢ (𝑥 ∈ ran ℵ → 𝑥 ∈ On) |
| 7 | 6 | ssriv 3921 | 1 ⊢ ran ℵ ⊆ On |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1542 ∈ wcel 2114 ⊆ wss 3885 ran crn 5621 Oncon0 6312 ‘cfv 6487 ωcom 7806 cardccrd 9848 ℵcale 9849 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2184 ax-ext 2707 ax-rep 5201 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7678 ax-inf2 9551 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-ral 3050 df-rex 3060 df-rmo 3340 df-reu 3341 df-rab 3388 df-v 3429 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-int 4880 df-iun 4925 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-se 5574 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-pred 6254 df-ord 6315 df-on 6316 df-lim 6317 df-suc 6318 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-isom 6496 df-riota 7313 df-ov 7359 df-om 7807 df-2nd 7932 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-1o 8394 df-er 8632 df-en 8883 df-dom 8884 df-sdom 8885 df-fin 8886 df-oi 9414 df-har 9461 df-card 9852 df-aleph 9853 |
| This theorem is referenced by: unialeph 10012 alephsmo 10013 alephfplem3 10017 alephfp 10019 alephfp2 10020 |
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