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Theorem gchen2 10547
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.)
Assertion
Ref Expression
gchen2 (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴𝐵𝐵 ≼ 𝒫 𝐴)) → 𝐵 ≈ 𝒫 𝐴)

Proof of Theorem gchen2
StepHypRef Expression
1 simprr 778 . 2 (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴𝐵𝐵 ≼ 𝒫 𝐴)) → 𝐵 ≼ 𝒫 𝐴)
2 gchi 10545 . . . . . 6 ((𝐴 ∈ GCH ∧ 𝐴𝐵𝐵 ≺ 𝒫 𝐴) → 𝐴 ∈ Fin)
323expia 1127 . . . . 5 ((𝐴 ∈ GCH ∧ 𝐴𝐵) → (𝐵 ≺ 𝒫 𝐴𝐴 ∈ Fin))
43con3dimp 409 . . . 4 (((𝐴 ∈ GCH ∧ 𝐴𝐵) ∧ ¬ 𝐴 ∈ Fin) → ¬ 𝐵 ≺ 𝒫 𝐴)
54an32s 658 . . 3 (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ 𝐴𝐵) → ¬ 𝐵 ≺ 𝒫 𝐴)
65adantrr 723 . 2 (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴𝐵𝐵 ≼ 𝒫 𝐴)) → ¬ 𝐵 ≺ 𝒫 𝐴)
7 bren2 8927 . 2 (𝐵 ≈ 𝒫 𝐴 ↔ (𝐵 ≼ 𝒫 𝐴 ∧ ¬ 𝐵 ≺ 𝒫 𝐴))
81, 6, 7sylanbrc 589 1 (((𝐴 ∈ GCH ∧ ¬ 𝐴 ∈ Fin) ∧ (𝐴𝐵𝐵 ≼ 𝒫 𝐴)) → 𝐵 ≈ 𝒫 𝐴)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 396  wcel 2119  𝒫 cpw 4536   class class class wbr 5079  cen 8887  cdom 8888  csdm 8889  Fincfn 8890  GCHcgch 10541
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-ext 2712  ax-sep 5225  ax-pr 5369
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-sb 2074  df-clab 2719  df-cleq 2732  df-clel 2815  df-ral 3055  df-rex 3065  df-rab 3393  df-v 3434  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4269  df-if 4462  df-pw 4538  df-sn 4563  df-pr 4565  df-op 4569  df-br 5080  df-opab 5142  df-xp 5631  df-rel 5632  df-f1o 6499  df-en 8891  df-dom 8892  df-sdom 8893  df-gch 10542
This theorem is referenced by:  gchhar  10600
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