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| Mirrors > Home > MPE Home > Th. List > winalim | Structured version Visualization version GIF version | ||
| Description: A weakly inaccessible cardinal is a limit ordinal. (Contributed by Mario Carneiro, 29-May-2014.) |
| Ref | Expression |
|---|---|
| winalim | ⊢ (𝐴 ∈ Inaccw → Lim 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | winainf 10760 | . 2 ⊢ (𝐴 ∈ Inaccw → ω ⊆ 𝐴) | |
| 2 | winacard 10758 | . . 3 ⊢ (𝐴 ∈ Inaccw → (card‘𝐴) = 𝐴) | |
| 3 | cardlim 10034 | . . . 4 ⊢ (ω ⊆ (card‘𝐴) ↔ Lim (card‘𝐴)) | |
| 4 | sseq2 3957 | . . . . 5 ⊢ ((card‘𝐴) = 𝐴 → (ω ⊆ (card‘𝐴) ↔ ω ⊆ 𝐴)) | |
| 5 | limeq 6367 | . . . . 5 ⊢ ((card‘𝐴) = 𝐴 → (Lim (card‘𝐴) ↔ Lim 𝐴)) | |
| 6 | 4, 5 | bibi12d 348 | . . . 4 ⊢ ((card‘𝐴) = 𝐴 → ((ω ⊆ (card‘𝐴) ↔ Lim (card‘𝐴)) ↔ (ω ⊆ 𝐴 ↔ Lim 𝐴))) |
| 7 | 3, 6 | mpbii 236 | . . 3 ⊢ ((card‘𝐴) = 𝐴 → (ω ⊆ 𝐴 ↔ Lim 𝐴)) |
| 8 | 2, 7 | syl 18 | . 2 ⊢ (𝐴 ∈ Inaccw → (ω ⊆ 𝐴 ↔ Lim 𝐴)) |
| 9 | 1, 8 | mpbid 235 | 1 ⊢ (𝐴 ∈ Inaccw → Lim 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ⊆ wss 3899 Lim wlim 6356 ‘cfv 6531 ωcom 7866 cardccrd 9997 Inaccwcwina 10748 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-om 7867 df-er 8701 df-en 8958 df-dom 8959 df-sdom 8960 df-card 10001 df-cf 10003 df-wina 10750 |
| This theorem is used by: inar1 10841 inatsk 10844 tskuni 10849 grur1a 10885 |
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