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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 9181 | . . 3 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ Fin ↔ 𝐵 ∈ Fin)) | |
| 2 | sdomen1 9119 | . . . . . 6 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ≺ 𝑥 ↔ 𝐵 ≺ 𝑥)) | |
| 3 | pwen 9148 | . . . . . . 7 ⊢ (𝐴 ≈ 𝐵 → 𝒫 𝐴 ≈ 𝒫 𝐵) | |
| 4 | sdomen2 9120 | . . . . . . 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 644 | . . . . 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 1953 | . . 3 ⊢ (𝐴 ≈ 𝐵 → (∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 9 | 1, 8 | orbi12d 932 | . 2 ⊢ (𝐴 ≈ 𝐵 → ((𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)) ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) |
| 10 | relen 8957 | . . . 4 ⊢ Rel ≈ | |
| 11 | 10 | brrelex1i 5711 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ∈ V) |
| 12 | elgch 10631 | . . 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 5712 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ∈ V) |
| 15 | elgch 10631 | . . 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 |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∨ wo 861 ∀wal 1568 ∈ wcel 2145 Vcvv 3450 𝒫 cpw 4557 class class class wbr 5103 ≈ cen 8949 ≺ csdm 8951 Fincfn 8952 GCHcgch 10629 |
| 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 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 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 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-1o 8455 df-2o 8456 df-er 8696 df-map 8828 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-gch 10630 |
| This theorem is used by: gch2 10684 |
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