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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 10707 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 10492 | . . . 4 ⊢ (𝐴 ∈ Fin → 𝐴 ∈ FinII) | |
| 2 | fin23 10468 | . . . 4 ⊢ (𝐴 ∈ FinII → 𝐴 ∈ FinIII) | |
| 3 | fin34 10469 | . . . 4 ⊢ (𝐴 ∈ FinIII → 𝐴 ∈ FinIV) | |
| 4 | 1, 2, 3 | 3syl 19 | . . 3 ⊢ (𝐴 ∈ Fin → 𝐴 ∈ FinIV) |
| 5 | isfin4p1 10394 | . . 3 ⊢ (𝐴 ∈ FinIV ↔ 𝐴 ≺ (𝐴 ⊔ 1o)) | |
| 6 | 4, 5 | sylib 221 | . 2 ⊢ (𝐴 ∈ Fin → 𝐴 ≺ (𝐴 ⊔ 1o)) |
| 7 | canthp1 10740 | . 2 ⊢ (1o ≺ 𝐴 → (𝐴 ⊔ 1o) ≺ 𝒫 𝐴) | |
| 8 | 6, 7 | anim12i 625 | 1 ⊢ ((𝐴 ∈ Fin ∧ 1o ≺ 𝐴) → (𝐴 ≺ (𝐴 ⊔ 1o) ∧ (𝐴 ⊔ 1o) ≺ 𝒫 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 𝒫 cpw 4557 class class class wbr 5103 1oc1o 8470 ≺ csdm 8973 Fincfn 8974 ⊔ cdju 9980 FinIIcfin2 10358 FinIVcfin4 10359 FinIIIcfin3 10360 |
| 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-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-inf2 9643 |
| 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-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 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-se 5605 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-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-rpss 7740 df-om 7879 df-1st 8002 df-2nd 8003 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-seqom 8459 df-1o 8477 df-2o 8478 df-er 8718 df-map 8850 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-oi 9505 df-wdom 9560 df-dju 9983 df-card 10021 df-fin2 10365 df-fin4 10366 df-fin3 10367 |
| This theorem is used by: (None) |
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