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| Mirrors > Home > MPE Home > Th. List > engch | Structured version Visualization version GIF version | ||
| Description: The property of being a GCH-set is a cardinal invariant. (Contributed by Mario Carneiro, 15-May-2015.) |
| Ref | Expression |
|---|---|
| engch | ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ GCH ↔ 𝐵 ∈ GCH)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | enfi 9167 | . . 3 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ Fin ↔ 𝐵 ∈ Fin)) | |
| 2 | sdomen1 9105 | . . . . . 6 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ≺ 𝑥 ↔ 𝐵 ≺ 𝑥)) | |
| 3 | pwen 9134 | . . . . . . 7 ⊢ (𝐴 ≈ 𝐵 → 𝒫 𝐴 ≈ 𝒫 𝐵) | |
| 4 | sdomen2 9106 | . . . . . . 7 ⊢ (𝒫 𝐴 ≈ 𝒫 𝐵 → (𝑥 ≺ 𝒫 𝐴 ↔ 𝑥 ≺ 𝒫 𝐵)) | |
| 5 | 3, 4 | syl 18 | . . . . . 6 ⊢ (𝐴 ≈ 𝐵 → (𝑥 ≺ 𝒫 𝐴 ↔ 𝑥 ≺ 𝒫 𝐵)) |
| 6 | 2, 5 | anbi12d 643 | . . . . 5 ⊢ (𝐴 ≈ 𝐵 → ((𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 7 | 6 | notbid 321 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → (¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 8 | 7 | albidv 1947 | . . 3 ⊢ (𝐴 ≈ 𝐵 → (∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 9 | 1, 8 | orbi12d 931 | . 2 ⊢ (𝐴 ≈ 𝐵 → ((𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)) ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) |
| 10 | relen 8944 | . . . 4 ⊢ Rel ≈ | |
| 11 | 10 | brrelex1i 5715 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ∈ V) |
| 12 | elgch 10603 | . . 3 ⊢ (𝐴 ∈ V → (𝐴 ∈ GCH ↔ (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)))) | |
| 13 | 11, 12 | syl 18 | . 2 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ GCH ↔ (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)))) |
| 14 | 10 | brrelex2i 5716 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ∈ V) |
| 15 | elgch 10603 | . . 3 ⊢ (𝐵 ∈ V → (𝐵 ∈ GCH ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) | |
| 16 | 14, 15 | syl 18 | . 2 ⊢ (𝐴 ≈ 𝐵 → (𝐵 ∈ GCH ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) |
| 17 | 9, 13, 16 | 3bitr4d 314 | 1 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ GCH ↔ 𝐵 ∈ GCH)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 ∨ wo 860 ∀wal 1565 ∈ wcel 2149 Vcvv 3463 𝒫 cpw 4564 class class class wbr 5110 ≈ cen 8936 ≺ csdm 8938 Fincfn 8939 GCHcgch 10601 |
| 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-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 |
| 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-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 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-1st 7982 df-2nd 7983 df-1o 8449 df-2o 8450 df-er 8690 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-gch 10602 |
| This theorem is referenced by: gch2 10656 |
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