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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 9111 | . . 3 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ Fin ↔ 𝐵 ∈ Fin)) | |
| 2 | sdomen1 9049 | . . . . . 6 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ≺ 𝑥 ↔ 𝐵 ≺ 𝑥)) | |
| 3 | pwen 9078 | . . . . . . 7 ⊢ (𝐴 ≈ 𝐵 → 𝒫 𝐴 ≈ 𝒫 𝐵) | |
| 4 | sdomen2 9050 | . . . . . . 7 ⊢ (𝒫 𝐴 ≈ 𝒫 𝐵 → (𝑥 ≺ 𝒫 𝐴 ↔ 𝑥 ≺ 𝒫 𝐵)) | |
| 5 | 3, 4 | syl 17 | . . . . . 6 ⊢ (𝐴 ≈ 𝐵 → (𝑥 ≺ 𝒫 𝐴 ↔ 𝑥 ≺ 𝒫 𝐵)) |
| 6 | 2, 5 | anbi12d 638 | . . . . 5 ⊢ (𝐴 ≈ 𝐵 → ((𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 7 | 6 | notbid 319 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → (¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 8 | 7 | albidv 1927 | . . 3 ⊢ (𝐴 ≈ 𝐵 → (∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴) ↔ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵))) |
| 9 | 1, 8 | orbi12d 924 | . 2 ⊢ (𝐴 ≈ 𝐵 → ((𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)) ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) |
| 10 | relen 8888 | . . . 4 ⊢ Rel ≈ | |
| 11 | 10 | brrelex1i 5674 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐴 ∈ V) |
| 12 | elgch 10536 | . . 3 ⊢ (𝐴 ∈ V → (𝐴 ∈ GCH ↔ (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)))) | |
| 13 | 11, 12 | syl 17 | . 2 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ GCH ↔ (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)))) |
| 14 | 10 | brrelex2i 5675 | . . 3 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ∈ V) |
| 15 | elgch 10536 | . . 3 ⊢ (𝐵 ∈ V → (𝐵 ∈ GCH ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) | |
| 16 | 14, 15 | syl 17 | . 2 ⊢ (𝐴 ≈ 𝐵 → (𝐵 ∈ GCH ↔ (𝐵 ∈ Fin ∨ ∀𝑥 ¬ (𝐵 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐵)))) |
| 17 | 9, 13, 16 | 3bitr4d 312 | 1 ⊢ (𝐴 ≈ 𝐵 → (𝐴 ∈ GCH ↔ 𝐵 ∈ GCH)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∧ wa 396 ∨ wo 853 ∀wal 1545 ∈ wcel 2119 Vcvv 3431 𝒫 cpw 4529 class class class wbr 5072 ≈ cen 8880 ≺ csdm 8882 Fincfn 8883 GCHcgch 10534 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-1o 8395 df-2o 8396 df-er 8633 df-map 8765 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-gch 10535 |
| This theorem is referenced by: gch2 10589 |
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