Theorem hargch 10089

Description: If 𝐴 + ≈ 𝒫 𝐴, then 𝐴 is a GCH-set. The much simpler converse to gchhar 10095. (Contributed by Mario Carneiro, 2-Jun-2015.)

Assertion

Ref	Expression
hargch	⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → 𝐴 ∈ GCH)

Proof of Theorem hargch

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		harcl 9019	. . . . . . . . . . . . . 14 ⊢ (har‘𝐴) ∈ On
2		sdomdom 8531	. . . . . . . . . . . . . 14 ⊢ (𝑥 ≺ (har‘𝐴) → 𝑥 ≼ (har‘𝐴))
3		ondomen 9457	. . . . . . . . . . . . . 14 ⊢ (((har‘𝐴) ∈ On ∧ 𝑥 ≼ (har‘𝐴)) → 𝑥 ∈ dom card)
4	1, 2, 3	sylancr 589	. . . . . . . . . . . . 13 ⊢ (𝑥 ≺ (har‘𝐴) → 𝑥 ∈ dom card)
5		onenon 9372	. . . . . . . . . . . . . 14 ⊢ ((har‘𝐴) ∈ On → (har‘𝐴) ∈ dom card)
6	1, 5	ax-mp 5	. . . . . . . . . . . . 13 ⊢ (har‘𝐴) ∈ dom card
7		cardsdom2 9411	. . . . . . . . . . . . 13 ⊢ ((𝑥 ∈ dom card ∧ (har‘𝐴) ∈ dom card) → ((card‘𝑥) ∈ (card‘(har‘𝐴)) ↔ 𝑥 ≺ (har‘𝐴)))
8	4, 6, 7	sylancl 588	. . . . . . . . . . . 12 ⊢ (𝑥 ≺ (har‘𝐴) → ((card‘𝑥) ∈ (card‘(har‘𝐴)) ↔ 𝑥 ≺ (har‘𝐴)))
9	8	ibir 270	. . . . . . . . . . 11 ⊢ (𝑥 ≺ (har‘𝐴) → (card‘𝑥) ∈ (card‘(har‘𝐴)))
10		harcard 9401	. . . . . . . . . . 11 ⊢ (card‘(har‘𝐴)) = (har‘𝐴)
11	9, 10	eleqtrdi 2923	. . . . . . . . . 10 ⊢ (𝑥 ≺ (har‘𝐴) → (card‘𝑥) ∈ (har‘𝐴))
12		elharval 9021	. . . . . . . . . . 11 ⊢ ((card‘𝑥) ∈ (har‘𝐴) ↔ ((card‘𝑥) ∈ On ∧ (card‘𝑥) ≼ 𝐴))
13	12	simprbi 499	. . . . . . . . . 10 ⊢ ((card‘𝑥) ∈ (har‘𝐴) → (card‘𝑥) ≼ 𝐴)
14	11, 13	syl 17	. . . . . . . . 9 ⊢ (𝑥 ≺ (har‘𝐴) → (card‘𝑥) ≼ 𝐴)
15		cardid2 9376	. . . . . . . . . 10 ⊢ (𝑥 ∈ dom card → (card‘𝑥) ≈ 𝑥)
16		domen1 8653	. . . . . . . . . 10 ⊢ ((card‘𝑥) ≈ 𝑥 → ((card‘𝑥) ≼ 𝐴 ↔ 𝑥 ≼ 𝐴))
17	4, 15, 16	3syl 18	. . . . . . . . 9 ⊢ (𝑥 ≺ (har‘𝐴) → ((card‘𝑥) ≼ 𝐴 ↔ 𝑥 ≼ 𝐴))
18	14, 17	mpbid 234	. . . . . . . 8 ⊢ (𝑥 ≺ (har‘𝐴) → 𝑥 ≼ 𝐴)
19		domnsym 8637	. . . . . . . 8 ⊢ (𝑥 ≼ 𝐴 → ¬ 𝐴 ≺ 𝑥)
20	18, 19	syl 17	. . . . . . 7 ⊢ (𝑥 ≺ (har‘𝐴) → ¬ 𝐴 ≺ 𝑥)
21	20	con2i 141	. . . . . 6 ⊢ (𝐴 ≺ 𝑥 → ¬ 𝑥 ≺ (har‘𝐴))
22		sdomen2 8656	. . . . . . 7 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → (𝑥 ≺ (har‘𝐴) ↔ 𝑥 ≺ 𝒫 𝐴))
23	22	notbid 320	. . . . . 6 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → (¬ 𝑥 ≺ (har‘𝐴) ↔ ¬ 𝑥 ≺ 𝒫 𝐴))
24	21, 23	syl5ib 246	. . . . 5 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → (𝐴 ≺ 𝑥 → ¬ 𝑥 ≺ 𝒫 𝐴))
25		imnan 402	. . . . 5 ⊢ ((𝐴 ≺ 𝑥 → ¬ 𝑥 ≺ 𝒫 𝐴) ↔ ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴))
26	24, 25	sylib 220	. . . 4 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴))
27	26	alrimiv 1924	. . 3 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴))
28	27	olcd 870	. 2 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴)))
29		relen 8508	. . . . 5 ⊢ Rel ≈
30	29	brrelex2i 5604	. . . 4 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → 𝒫 𝐴 ∈ V)
31		pwexb 7482	. . . 4 ⊢ (𝐴 ∈ V ↔ 𝒫 𝐴 ∈ V)
32	30, 31	sylibr 236	. . 3 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → 𝐴 ∈ V)
33		elgch 10038	. . 3 ⊢ (𝐴 ∈ V → (𝐴 ∈ GCH ↔ (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴))))
34	32, 33	syl 17	. 2 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → (𝐴 ∈ GCH ↔ (𝐴 ∈ Fin ∨ ∀𝑥 ¬ (𝐴 ≺ 𝑥 ∧ 𝑥 ≺ 𝒫 𝐴))))
35	28, 34	mpbird 259	1 ⊢ ((har‘𝐴) ≈ 𝒫 𝐴 → 𝐴 ∈ GCH)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∨ wo 843  ∀wal 1531   ∈ wcel 2110  Vcvv 3495  𝒫 cpw 4539   class class class wbr 5059  dom cdm 5550  Oncon0 6186  ‘cfv 6350   ≈ cen 8500   ≼ cdom 8501   ≺ csdm 8502  Fincfn 8503  harchar 9014  cardccrd 9358  GCHcgch 10036

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-rep 5183  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3497  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-pss 3954  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-tp 4566  df-op 4568  df-uni 4833  df-int 4870  df-iun 4914  df-br 5060  df-opab 5122  df-mpt 5140  df-tr 5166  df-id 5455  df-eprel 5460  df-po 5469  df-so 5470  df-fr 5509  df-se 5510  df-we 5511  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-pred 6143  df-ord 6189  df-on 6190  df-lim 6191  df-suc 6192  df-iota 6309  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-fv 6358  df-isom 6359  df-riota 7108  df-wrecs 7941  df-recs 8002  df-er 8283  df-en 8504  df-dom 8505  df-sdom 8506  df-oi 8968  df-har 9016  df-card 9362  df-gch 10037

This theorem is referenced by: (None)