Theorem alephnbtwn2 9826

Description: No set has equinumerosity between an aleph and its successor aleph. (Contributed by NM, 3-Nov-2003.) (Revised by Mario Carneiro, 2-Feb-2013.)

Assertion

Ref	Expression
alephnbtwn2	⊢ ¬ ((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴))

Proof of Theorem alephnbtwn2

Step	Hyp	Ref	Expression
1		cardidm 9715	. . 3 ⊢ (card‘(card‘𝐵)) = (card‘𝐵)
2		alephnbtwn 9825	. . 3 ⊢ ((card‘(card‘𝐵)) = (card‘𝐵) → ¬ ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴)))
3	1, 2	ax-mp 5	. 2 ⊢ ¬ ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
4		alephon 9823	. . . . . . . 8 ⊢ (ℵ‘suc 𝐴) ∈ On
5		sdomdom 8766	. . . . . . . 8 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ≼ (ℵ‘suc 𝐴))
6		ondomen 9791	. . . . . . . 8 ⊢ (((ℵ‘suc 𝐴) ∈ On ∧ 𝐵 ≼ (ℵ‘suc 𝐴)) → 𝐵 ∈ dom card)
7	4, 5, 6	sylancr 587	. . . . . . 7 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ∈ dom card)
8		cardid2 9709	. . . . . . 7 ⊢ (𝐵 ∈ dom card → (card‘𝐵) ≈ 𝐵)
9	7, 8	syl 17	. . . . . 6 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → (card‘𝐵) ≈ 𝐵)
10	9	ensymd 8789	. . . . 5 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ≈ (card‘𝐵))
11		sdomentr 8896	. . . . 5 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≈ (card‘𝐵)) → (ℵ‘𝐴) ≺ (card‘𝐵))
12	10, 11	sylan2 593	. . . 4 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (ℵ‘𝐴) ≺ (card‘𝐵))
13		alephon 9823	. . . . . 6 ⊢ (ℵ‘𝐴) ∈ On
14		cardon 9700	. . . . . . 7 ⊢ (card‘𝐵) ∈ On
15		onenon 9705	. . . . . . 7 ⊢ ((card‘𝐵) ∈ On → (card‘𝐵) ∈ dom card)
16	14, 15	ax-mp 5	. . . . . 6 ⊢ (card‘𝐵) ∈ dom card
17		cardsdomel 9730	. . . . . 6 ⊢ (((ℵ‘𝐴) ∈ On ∧ (card‘𝐵) ∈ dom card) → ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘(card‘𝐵))))
18	13, 16, 17	mp2an 689	. . . . 5 ⊢ ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘(card‘𝐵)))
19	1	eleq2i 2830	. . . . 5 ⊢ ((ℵ‘𝐴) ∈ (card‘(card‘𝐵)) ↔ (ℵ‘𝐴) ∈ (card‘𝐵))
20	18, 19	bitri 274	. . . 4 ⊢ ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘𝐵))
21	12, 20	sylib 217	. . 3 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (ℵ‘𝐴) ∈ (card‘𝐵))
22		ensdomtr 8898	. . . . . 6 ⊢ (((card‘𝐵) ≈ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
23	9, 22	mpancom 685	. . . . 5 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
24	23	adantl 482	. . . 4 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
25		onenon 9705	. . . . . . 7 ⊢ ((ℵ‘suc 𝐴) ∈ On → (ℵ‘suc 𝐴) ∈ dom card)
26	4, 25	ax-mp 5	. . . . . 6 ⊢ (ℵ‘suc 𝐴) ∈ dom card
27		cardsdomel 9730	. . . . . 6 ⊢ (((card‘𝐵) ∈ On ∧ (ℵ‘suc 𝐴) ∈ dom card) → ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴))))
28	14, 26, 27	mp2an 689	. . . . 5 ⊢ ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴)))
29		alephcard 9824	. . . . . 6 ⊢ (card‘(ℵ‘suc 𝐴)) = (ℵ‘suc 𝐴)
30	29	eleq2i 2830	. . . . 5 ⊢ ((card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴)) ↔ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
31	28, 30	bitri 274	. . . 4 ⊢ ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
32	24, 31	sylib 217	. . 3 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ∈ (ℵ‘suc 𝐴))
33	21, 32	jca 512	. 2 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴)))
34	3, 33	mto 196	1 ⊢ ¬ ((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴))

Syntax hints:  ¬ wn 3   ↔ wb 205   ∧ wa 396   = wceq 1539   ∈ wcel 2106   class class class wbr 5076  dom cdm 5591  Oncon0 6268  suc csuc 6270  ‘cfv 6435   ≈ cen 8728   ≼ cdom 8729   ≺ csdm 8730  cardccrd 9691  ℵcale 9692

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5211  ax-sep 5225  ax-nul 5232  ax-pow 5290  ax-pr 5354  ax-un 7588  ax-inf2 9397

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3433  df-sbc 3718  df-csb 3834  df-dif 3891  df-un 3893  df-in 3895  df-ss 3905  df-pss 3907  df-nul 4259  df-if 4462  df-pw 4537  df-sn 4564  df-pr 4566  df-op 4570  df-uni 4842  df-int 4882  df-iun 4928  df-br 5077  df-opab 5139  df-mpt 5160  df-tr 5194  df-id 5491  df-eprel 5497  df-po 5505  df-so 5506  df-fr 5546  df-se 5547  df-we 5548  df-xp 5597  df-rel 5598  df-cnv 5599  df-co 5600  df-dm 5601  df-rn 5602  df-res 5603  df-ima 5604  df-pred 6204  df-ord 6271  df-on 6272  df-lim 6273  df-suc 6274  df-iota 6393  df-fun 6437  df-fn 6438  df-f 6439  df-f1 6440  df-fo 6441  df-f1o 6442  df-fv 6443  df-isom 6444  df-riota 7234  df-ov 7280  df-om 7713  df-2nd 7832  df-frecs 8095  df-wrecs 8126  df-recs 8200  df-rdg 8239  df-1o 8295  df-er 8496  df-en 8732  df-dom 8733  df-sdom 8734  df-fin 8735  df-oi 9267  df-har 9314  df-card 9695  df-aleph 9696

This theorem is referenced by:  alephsucdom  9833  alephsucpw2  9865  alephgch  10428  winalim2  10450  aleph1re  15952