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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 10606 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 10397 | . . . 4 ⊢ (𝐴 ∈ Fin → 𝐴 ∈ FinII) | |
| 2 | fin23 10373 | . . . 4 ⊢ (𝐴 ∈ FinII → 𝐴 ∈ FinIII) | |
| 3 | fin34 10374 | . . . 4 ⊢ (𝐴 ∈ FinIII → 𝐴 ∈ FinIV) | |
| 4 | 1, 2, 3 | 3syl 19 | . . 3 ⊢ (𝐴 ∈ Fin → 𝐴 ∈ FinIV) |
| 5 | isfin4p1 10299 | . . 3 ⊢ (𝐴 ∈ FinIV ↔ 𝐴 ≺ (𝐴 ⊔ 1o)) | |
| 6 | 4, 5 | sylib 221 | . 2 ⊢ (𝐴 ∈ Fin → 𝐴 ≺ (𝐴 ⊔ 1o)) |
| 7 | canthp1 10639 | . 2 ⊢ (1o ≺ 𝐴 → (𝐴 ⊔ 1o) ≺ 𝒫 𝐴) | |
| 8 | 6, 7 | anim12i 624 | 1 ⊢ ((𝐴 ∈ Fin ∧ 1o ≺ 𝐴) → (𝐴 ≺ (𝐴 ⊔ 1o) ∧ (𝐴 ⊔ 1o) ≺ 𝒫 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2149 𝒫 cpw 4567 class class class wbr 5113 1oc1o 8446 ≺ csdm 8942 Fincfn 8943 ⊔ cdju 9884 FinIIcfin2 10263 FinIVcfin4 10264 FinIIIcfin3 10265 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-inf2 9610 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-se 5616 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-rpss 7721 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-seqom 8435 df-1o 8453 df-2o 8454 df-er 8694 df-map 8826 df-en 8944 df-dom 8945 df-sdom 8946 df-fin 8947 df-oi 9472 df-wdom 9527 df-dju 9887 df-card 9925 df-fin2 10270 df-fin4 10271 df-fin3 10272 |
| This theorem is referenced by: (None) |
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