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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 10381 | . 2 ⊢ (𝐴 ∈ Inaccw → ω ⊆ 𝐴) | |
2 | winacard 10379 | . . 3 ⊢ (𝐴 ∈ Inaccw → (card‘𝐴) = 𝐴) | |
3 | cardlim 9661 | . . . 4 ⊢ (ω ⊆ (card‘𝐴) ↔ Lim (card‘𝐴)) | |
4 | sseq2 3943 | . . . . 5 ⊢ ((card‘𝐴) = 𝐴 → (ω ⊆ (card‘𝐴) ↔ ω ⊆ 𝐴)) | |
5 | limeq 6263 | . . . . 5 ⊢ ((card‘𝐴) = 𝐴 → (Lim (card‘𝐴) ↔ Lim 𝐴)) | |
6 | 4, 5 | bibi12d 345 | . . . 4 ⊢ ((card‘𝐴) = 𝐴 → ((ω ⊆ (card‘𝐴) ↔ Lim (card‘𝐴)) ↔ (ω ⊆ 𝐴 ↔ Lim 𝐴))) |
7 | 3, 6 | mpbii 232 | . . 3 ⊢ ((card‘𝐴) = 𝐴 → (ω ⊆ 𝐴 ↔ Lim 𝐴)) |
8 | 2, 7 | syl 17 | . 2 ⊢ (𝐴 ∈ Inaccw → (ω ⊆ 𝐴 ↔ Lim 𝐴)) |
9 | 1, 8 | mpbid 231 | 1 ⊢ (𝐴 ∈ Inaccw → Lim 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 = wceq 1539 ∈ wcel 2108 ⊆ wss 3883 Lim wlim 6252 ‘cfv 6418 ωcom 7687 cardccrd 9624 Inaccwcwina 10369 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-om 7688 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-card 9628 df-cf 9630 df-wina 10371 |
This theorem is referenced by: inar1 10462 inatsk 10465 tskuni 10470 grur1a 10506 |
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