Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > gchcda1 | Structured version Visualization version GIF version |
Description: An infinite GCH-set is idempotent under cardinal successor. (Contributed by Mario Carneiro, 18-May-2015.) |
Ref | Expression |
---|---|
gchcda1 | ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (𝐴 +𝑐 1𝑜) ≈ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1onn 7606 | . . . . . 6 ⊢ 1𝑜 ∈ ω | |
2 | 1 | a1i 11 | . . . . 5 ⊢ (¬ 𝐴 ∈ Fin → 1𝑜 ∈ ω) |
3 | cdadom3 8893 | . . . . 5 ⊢ ((𝐴 ∈ GCH ∧ 1𝑜 ∈ ω) → 𝐴 ≼ (𝐴 +𝑐 1𝑜)) | |
4 | 2, 3 | sylan2 490 | . . . 4 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → 𝐴 ≼ (𝐴 +𝑐 1𝑜)) |
5 | simpr 476 | . . . . . 6 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → ¬ 𝐴 ∈ Fin) | |
6 | nnfi 8038 | . . . . . . . . 9 ⊢ (1𝑜 ∈ ω → 1𝑜 ∈ Fin) | |
7 | 1, 6 | mp1i 13 | . . . . . . . 8 ⊢ (¬ 𝐴 ∈ Fin → 1𝑜 ∈ Fin) |
8 | fidomtri2 8703 | . . . . . . . 8 ⊢ ((𝐴 ∈ GCH ∧ 1𝑜 ∈ Fin) → (𝐴 ≼ 1𝑜 ↔ ¬ 1𝑜 ≺ 𝐴)) | |
9 | 7, 8 | sylan2 490 | . . . . . . 7 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (𝐴 ≼ 1𝑜 ↔ ¬ 1𝑜 ≺ 𝐴)) |
10 | 1, 6 | mp1i 13 | . . . . . . . 8 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → 1𝑜 ∈ Fin) |
11 | domfi 8066 | . . . . . . . . 9 ⊢ ((1𝑜 ∈ Fin ∧ 𝐴 ≼ 1𝑜) → 𝐴 ∈ Fin) | |
12 | 11 | ex 449 | . . . . . . . 8 ⊢ (1𝑜 ∈ Fin → (𝐴 ≼ 1𝑜 → 𝐴 ∈ Fin)) |
13 | 10, 12 | syl 17 | . . . . . . 7 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (𝐴 ≼ 1𝑜 → 𝐴 ∈ Fin)) |
14 | 9, 13 | sylbird 249 | . . . . . 6 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (¬ 1𝑜 ≺ 𝐴 → 𝐴 ∈ Fin)) |
15 | 5, 14 | mt3d 139 | . . . . 5 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → 1𝑜 ≺ 𝐴) |
16 | canthp1 9355 | . . . . 5 ⊢ (1𝑜 ≺ 𝐴 → (𝐴 +𝑐 1𝑜) ≺ 𝒫 𝐴) | |
17 | 15, 16 | syl 17 | . . . 4 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (𝐴 +𝑐 1𝑜) ≺ 𝒫 𝐴) |
18 | 4, 17 | jca 553 | . . 3 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (𝐴 ≼ (𝐴 +𝑐 1𝑜) ∧ (𝐴 +𝑐 1𝑜) ≺ 𝒫 𝐴)) |
19 | gchen1 9326 | . . 3 ⊢ (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴 ≼ (𝐴 +𝑐 1𝑜) ∧ (𝐴 +𝑐 1𝑜) ≺ 𝒫 𝐴)) → 𝐴 ≈ (𝐴 +𝑐 1𝑜)) | |
20 | 18, 19 | mpdan 699 | . 2 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → 𝐴 ≈ (𝐴 +𝑐 1𝑜)) |
21 | 20 | ensymd 7893 | 1 ⊢ ((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) → (𝐴 +𝑐 1𝑜) ≈ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 ∈ wcel 1977 𝒫 cpw 4108 class class class wbr 4583 (class class class)co 6549 ωcom 6957 1𝑜c1o 7440 ≈ cen 7838 ≼ cdom 7839 ≺ csdm 7840 Fincfn 7841 +𝑐 ccda 8872 GCHcgch 9321 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-2o 7448 df-oadd 7451 df-er 7629 df-map 7746 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-oi 8298 df-card 8648 df-cda 8873 df-gch 9322 |
This theorem is referenced by: gchinf 9358 gchcdaidm 9369 gchpwdom 9371 |
Copyright terms: Public domain | W3C validator |