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Mirrors > Home > MPE Home > Th. List > finngch | Structured version Visualization version GIF version |
Description: The exclusion of finite sets from consideration in df-gch 10616 is necessary, because otherwise finite sets larger than a singleton would violate the GCH property. (Contributed by Mario Carneiro, 10-Jun-2015.) |
Ref | Expression |
---|---|
finngch | ⊢ ((𝐴 ∈ Fin ∧ 1o ≺ 𝐴) → (𝐴 ≺ (𝐴 ⊔ 1o) ∧ (𝐴 ⊔ 1o) ≺ 𝒫 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fin12 10408 | . . . 4 ⊢ (𝐴 ∈ Fin → 𝐴 ∈ FinII) | |
2 | fin23 10384 | . . . 4 ⊢ (𝐴 ∈ FinII → 𝐴 ∈ FinIII) | |
3 | fin34 10385 | . . . 4 ⊢ (𝐴 ∈ FinIII → 𝐴 ∈ FinIV) | |
4 | 1, 2, 3 | 3syl 18 | . . 3 ⊢ (𝐴 ∈ Fin → 𝐴 ∈ FinIV) |
5 | isfin4p1 10310 | . . 3 ⊢ (𝐴 ∈ FinIV ↔ 𝐴 ≺ (𝐴 ⊔ 1o)) | |
6 | 4, 5 | sylib 217 | . 2 ⊢ (𝐴 ∈ Fin → 𝐴 ≺ (𝐴 ⊔ 1o)) |
7 | canthp1 10649 | . 2 ⊢ (1o ≺ 𝐴 → (𝐴 ⊔ 1o) ≺ 𝒫 𝐴) | |
8 | 6, 7 | anim12i 614 | 1 ⊢ ((𝐴 ∈ Fin ∧ 1o ≺ 𝐴) → (𝐴 ≺ (𝐴 ⊔ 1o) ∧ (𝐴 ⊔ 1o) ≺ 𝒫 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 397 ∈ wcel 2107 𝒫 cpw 4603 class class class wbr 5149 1oc1o 8459 ≺ csdm 8938 Fincfn 8939 ⊔ cdju 9893 FinIIcfin2 10274 FinIVcfin4 10275 FinIIIcfin3 10276 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-inf2 9636 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-rpss 7713 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-seqom 8448 df-1o 8466 df-2o 8467 df-er 8703 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-oi 9505 df-wdom 9560 df-dju 9896 df-card 9934 df-fin2 10281 df-fin4 10282 df-fin3 10283 |
This theorem is referenced by: (None) |
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