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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 10114 | . . 3 ⊢ ((ω ⊆ 𝑥 ∧ (card‘𝑥) = 𝑥) ↔ 𝑥 ∈ ran ℵ) | |
| 2 | cardon 9966 | . . . . 5 ⊢ (card‘𝑥) ∈ On | |
| 3 | eleq1 2821 | . . . . 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 3967 | 1 ⊢ ran ℵ ⊆ On |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1539 ∈ wcel 2107 ⊆ wss 3931 ran crn 5666 Oncon0 6363 ‘cfv 6541 ωcom 7869 cardccrd 9957 ℵcale 9958 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-rep 5259 ax-sep 5276 ax-nul 5286 ax-pow 5345 ax-pr 5412 ax-un 7737 ax-inf2 9663 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-ral 3051 df-rex 3060 df-rmo 3363 df-reu 3364 df-rab 3420 df-v 3465 df-sbc 3771 df-csb 3880 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-pss 3951 df-nul 4314 df-if 4506 df-pw 4582 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4888 df-int 4927 df-iun 4973 df-br 5124 df-opab 5186 df-mpt 5206 df-tr 5240 df-id 5558 df-eprel 5564 df-po 5572 df-so 5573 df-fr 5617 df-se 5618 df-we 5619 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6301 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-isom 6550 df-riota 7370 df-ov 7416 df-om 7870 df-2nd 7997 df-frecs 8288 df-wrecs 8319 df-recs 8393 df-rdg 8432 df-1o 8488 df-er 8727 df-en 8968 df-dom 8969 df-sdom 8970 df-fin 8971 df-oi 9532 df-har 9579 df-card 9961 df-aleph 9962 |
| This theorem is referenced by: unialeph 10123 alephsmo 10124 alephfplem3 10128 alephfp 10130 alephfp2 10131 |
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