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Mirrors > Home > MPE Home > Th. List > gchen2 | Structured version Visualization version GIF version |
Description: If 𝐴 < 𝐵 ≤ 𝒫 𝐴, and 𝐴 is an infinite GCH-set, then 𝐵 = 𝒫 𝐴 in cardinality. (Contributed by Mario Carneiro, 15-May-2015.) |
Ref | Expression |
---|---|
gchen2 | ⊢ (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴 ≺ 𝐵 ∧ 𝐵 ≼ 𝒫 𝐴)) → 𝐵 ≈ 𝒫 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simprr 791 | . 2 ⊢ (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴 ≺ 𝐵 ∧ 𝐵 ≼ 𝒫 𝐴)) → 𝐵 ≼ 𝒫 𝐴) | |
2 | gchi 9762 | . . . . . 6 ⊢ ((𝐴 ∈ GCH ∧ 𝐴 ≺ 𝐵 ∧ 𝐵 ≺ 𝒫 𝐴) → 𝐴 ∈ Fin) | |
3 | 2 | 3expia 1156 | . . . . 5 ⊢ ((𝐴 ∈ GCH ∧ 𝐴 ≺ 𝐵) → (𝐵 ≺ 𝒫 𝐴 → 𝐴 ∈ Fin)) |
4 | 3 | con3dimp 399 | . . . 4 ⊢ (((𝐴 ∈ GCH ∧ 𝐴 ≺ 𝐵) ∧ ¬ 𝐴 ∈ Fin) → ¬ 𝐵 ≺ 𝒫 𝐴) |
5 | 4 | an32s 644 | . . 3 ⊢ (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ 𝐴 ≺ 𝐵) → ¬ 𝐵 ≺ 𝒫 𝐴) |
6 | 5 | adantrr 710 | . 2 ⊢ (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴 ≺ 𝐵 ∧ 𝐵 ≼ 𝒫 𝐴)) → ¬ 𝐵 ≺ 𝒫 𝐴) |
7 | bren2 8254 | . 2 ⊢ (𝐵 ≈ 𝒫 𝐴 ↔ (𝐵 ≼ 𝒫 𝐴 ∧ ¬ 𝐵 ≺ 𝒫 𝐴)) | |
8 | 1, 6, 7 | sylanbrc 580 | 1 ⊢ (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴 ≺ 𝐵 ∧ 𝐵 ≼ 𝒫 𝐴)) → 𝐵 ≈ 𝒫 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 386 ∈ wcel 2166 𝒫 cpw 4379 class class class wbr 4874 ≈ cen 8220 ≼ cdom 8221 ≺ csdm 8222 Fincfn 8223 GCHcgch 9758 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1896 ax-4 1910 ax-5 2011 ax-6 2077 ax-7 2114 ax-9 2175 ax-10 2194 ax-11 2209 ax-12 2222 ax-13 2391 ax-ext 2804 ax-sep 5006 ax-nul 5014 ax-pr 5128 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 881 df-3an 1115 df-tru 1662 df-ex 1881 df-nf 1885 df-sb 2070 df-mo 2606 df-eu 2641 df-clab 2813 df-cleq 2819 df-clel 2822 df-nfc 2959 df-ral 3123 df-rex 3124 df-rab 3127 df-v 3417 df-dif 3802 df-un 3804 df-in 3806 df-ss 3813 df-nul 4146 df-if 4308 df-pw 4381 df-sn 4399 df-pr 4401 df-op 4405 df-br 4875 df-opab 4937 df-xp 5349 df-rel 5350 df-f1o 6131 df-en 8224 df-dom 8225 df-sdom 8226 df-gch 9759 |
This theorem is referenced by: gchhar 9817 |
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