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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 10005 | . . 3 ⊢ ((ω ⊆ 𝑥 ∧ (card‘𝑥) = 𝑥) ↔ 𝑥 ∈ ran ℵ) | |
| 2 | cardon 9859 | . . . . 5 ⊢ (card‘𝑥) ∈ On | |
| 3 | eleq1 2816 | . . . . 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 3941 | 1 ⊢ ran ℵ ⊆ On |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1540 ∈ wcel 2109 ⊆ wss 3905 ran crn 5624 Oncon0 6311 ‘cfv 6486 ωcom 7806 cardccrd 9850 ℵcale 9851 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 ax-inf2 9556 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3345 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-int 4900 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-se 5577 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-isom 6495 df-riota 7310 df-ov 7356 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8632 df-en 8880 df-dom 8881 df-sdom 8882 df-fin 8883 df-oi 9421 df-har 9468 df-card 9854 df-aleph 9855 |
| This theorem is referenced by: unialeph 10014 alephsmo 10015 alephfplem3 10019 alephfp 10021 alephfp2 10022 |
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