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Theorem alephnbtwn2 8840
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) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴))

Proof of Theorem alephnbtwn2
StepHypRef Expression
1 cardidm 8730 . . 3 (card‘(card‘𝐵)) = (card‘𝐵)
2 alephnbtwn 8839 . . 3 ((card‘(card‘𝐵)) = (card‘𝐵) → ¬ ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴)))
31, 2ax-mp 5 . 2 ¬ ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
4 alephon 8837 . . . . . . . 8 (ℵ‘suc 𝐴) ∈ On
5 sdomdom 7928 . . . . . . . 8 (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ≼ (ℵ‘suc 𝐴))
6 ondomen 8805 . . . . . . . 8 (((ℵ‘suc 𝐴) ∈ On ∧ 𝐵 ≼ (ℵ‘suc 𝐴)) → 𝐵 ∈ dom card)
74, 5, 6sylancr 694 . . . . . . 7 (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ∈ dom card)
8 cardid2 8724 . . . . . . 7 (𝐵 ∈ dom card → (card‘𝐵) ≈ 𝐵)
97, 8syl 17 . . . . . 6 (𝐵 ≺ (ℵ‘suc 𝐴) → (card‘𝐵) ≈ 𝐵)
109ensymd 7952 . . . . 5 (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ≈ (card‘𝐵))
11 sdomentr 8039 . . . . 5 (((ℵ‘𝐴) ≺ 𝐵𝐵 ≈ (card‘𝐵)) → (ℵ‘𝐴) ≺ (card‘𝐵))
1210, 11sylan2 491 . . . 4 (((ℵ‘𝐴) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴)) → (ℵ‘𝐴) ≺ (card‘𝐵))
13 alephon 8837 . . . . . 6 (ℵ‘𝐴) ∈ On
14 cardon 8715 . . . . . . 7 (card‘𝐵) ∈ On
15 onenon 8720 . . . . . . 7 ((card‘𝐵) ∈ On → (card‘𝐵) ∈ dom card)
1614, 15ax-mp 5 . . . . . 6 (card‘𝐵) ∈ dom card
17 cardsdomel 8745 . . . . . 6 (((ℵ‘𝐴) ∈ On ∧ (card‘𝐵) ∈ dom card) → ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘(card‘𝐵))))
1813, 16, 17mp2an 707 . . . . 5 ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘(card‘𝐵)))
191eleq2i 2696 . . . . 5 ((ℵ‘𝐴) ∈ (card‘(card‘𝐵)) ↔ (ℵ‘𝐴) ∈ (card‘𝐵))
2018, 19bitri 264 . . . 4 ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘𝐵))
2112, 20sylib 208 . . 3 (((ℵ‘𝐴) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴)) → (ℵ‘𝐴) ∈ (card‘𝐵))
22 ensdomtr 8041 . . . . . 6 (((card‘𝐵) ≈ 𝐵𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
239, 22mpancom 702 . . . . 5 (𝐵 ≺ (ℵ‘suc 𝐴) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
2423adantl 482 . . . 4 (((ℵ‘𝐴) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
25 onenon 8720 . . . . . . 7 ((ℵ‘suc 𝐴) ∈ On → (ℵ‘suc 𝐴) ∈ dom card)
264, 25ax-mp 5 . . . . . 6 (ℵ‘suc 𝐴) ∈ dom card
27 cardsdomel 8745 . . . . . 6 (((card‘𝐵) ∈ On ∧ (ℵ‘suc 𝐴) ∈ dom card) → ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴))))
2814, 26, 27mp2an 707 . . . . 5 ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴)))
29 alephcard 8838 . . . . . 6 (card‘(ℵ‘suc 𝐴)) = (ℵ‘suc 𝐴)
3029eleq2i 2696 . . . . 5 ((card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴)) ↔ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
3128, 30bitri 264 . . . 4 ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
3224, 31sylib 208 . . 3 (((ℵ‘𝐴) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ∈ (ℵ‘suc 𝐴))
3321, 32jca 554 . 2 (((ℵ‘𝐴) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴)) → ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴)))
343, 33mto 188 1 ¬ ((ℵ‘𝐴) ≺ 𝐵𝐵 ≺ (ℵ‘suc 𝐴))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wb 196  wa 384   = wceq 1480  wcel 1992   class class class wbr 4618  dom cdm 5079  Oncon0 5685  suc csuc 5687  cfv 5850  cen 7897  cdom 7898  csdm 7899  cardccrd 8706  cale 8707
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1841  ax-6 1890  ax-7 1937  ax-8 1994  ax-9 2001  ax-10 2021  ax-11 2036  ax-12 2049  ax-13 2250  ax-ext 2606  ax-rep 4736  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6903  ax-inf2 8483
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1883  df-eu 2478  df-mo 2479  df-clab 2613  df-cleq 2619  df-clel 2622  df-nfc 2756  df-ne 2797  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3193  df-sbc 3423  df-csb 3520  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-pss 3576  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-tp 4158  df-op 4160  df-uni 4408  df-int 4446  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-tr 4718  df-eprel 4990  df-id 4994  df-po 5000  df-so 5001  df-fr 5038  df-se 5039  df-we 5040  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-pred 5642  df-ord 5688  df-on 5689  df-lim 5690  df-suc 5691  df-iota 5813  df-fun 5852  df-fn 5853  df-f 5854  df-f1 5855  df-fo 5856  df-f1o 5857  df-fv 5858  df-isom 5859  df-riota 6566  df-om 7014  df-wrecs 7353  df-recs 7414  df-rdg 7452  df-er 7688  df-en 7901  df-dom 7902  df-sdom 7903  df-fin 7904  df-oi 8360  df-har 8408  df-card 8710  df-aleph 8711
This theorem is referenced by:  alephsucdom  8847  alephsucpw2  8879  alephgch  9441  winalim2  9463  aleph1re  14894
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