Theorem alephnbtwn2 9996

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 9885	. . 3 ⊢ (card‘(card‘𝐵)) = (card‘𝐵)
2		alephnbtwn 9995	. . 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 9993	. . . . . . . 8 ⊢ (ℵ‘suc 𝐴) ∈ On
5		sdomdom 8931	. . . . . . . 8 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ≼ (ℵ‘suc 𝐴))
6		ondomen 9961	. . . . . . . 8 ⊢ (((ℵ‘suc 𝐴) ∈ On ∧ 𝐵 ≼ (ℵ‘suc 𝐴)) → 𝐵 ∈ dom card)
7	4, 5, 6	sylancr 588	. . . . . . 7 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ∈ dom card)
8		cardid2 9879	. . . . . . 7 ⊢ (𝐵 ∈ dom card → (card‘𝐵) ≈ 𝐵)
9	7, 8	syl 17	. . . . . 6 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → (card‘𝐵) ≈ 𝐵)
10	9	ensymd 8956	. . . . 5 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → 𝐵 ≈ (card‘𝐵))
11		sdomentr 9053	. . . . 5 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≈ (card‘𝐵)) → (ℵ‘𝐴) ≺ (card‘𝐵))
12	10, 11	sylan2 594	. . . 4 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (ℵ‘𝐴) ≺ (card‘𝐵))
13		alephon 9993	. . . . . 6 ⊢ (ℵ‘𝐴) ∈ On
14		cardon 9870	. . . . . . 7 ⊢ (card‘𝐵) ∈ On
15		onenon 9875	. . . . . . 7 ⊢ ((card‘𝐵) ∈ On → (card‘𝐵) ∈ dom card)
16	14, 15	ax-mp 5	. . . . . 6 ⊢ (card‘𝐵) ∈ dom card
17		cardsdomel 9900	. . . . . 6 ⊢ (((ℵ‘𝐴) ∈ On ∧ (card‘𝐵) ∈ dom card) → ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘(card‘𝐵))))
18	13, 16, 17	mp2an 693	. . . . 5 ⊢ ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘(card‘𝐵)))
19	1	eleq2i 2829	. . . . 5 ⊢ ((ℵ‘𝐴) ∈ (card‘(card‘𝐵)) ↔ (ℵ‘𝐴) ∈ (card‘𝐵))
20	18, 19	bitri 275	. . . 4 ⊢ ((ℵ‘𝐴) ≺ (card‘𝐵) ↔ (ℵ‘𝐴) ∈ (card‘𝐵))
21	12, 20	sylib 218	. . 3 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (ℵ‘𝐴) ∈ (card‘𝐵))
22		ensdomtr 9055	. . . . . 6 ⊢ (((card‘𝐵) ≈ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
23	9, 22	mpancom 689	. . . . 5 ⊢ (𝐵 ≺ (ℵ‘suc 𝐴) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
24	23	adantl 481	. . . 4 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ≺ (ℵ‘suc 𝐴))
25		onenon 9875	. . . . . . 7 ⊢ ((ℵ‘suc 𝐴) ∈ On → (ℵ‘suc 𝐴) ∈ dom card)
26	4, 25	ax-mp 5	. . . . . 6 ⊢ (ℵ‘suc 𝐴) ∈ dom card
27		cardsdomel 9900	. . . . . 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 693	. . . . 5 ⊢ ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴)))
29		alephcard 9994	. . . . . 6 ⊢ (card‘(ℵ‘suc 𝐴)) = (ℵ‘suc 𝐴)
30	29	eleq2i 2829	. . . . 5 ⊢ ((card‘𝐵) ∈ (card‘(ℵ‘suc 𝐴)) ↔ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
31	28, 30	bitri 275	. . . 4 ⊢ ((card‘𝐵) ≺ (ℵ‘suc 𝐴) ↔ (card‘𝐵) ∈ (ℵ‘suc 𝐴))
32	24, 31	sylib 218	. . 3 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → (card‘𝐵) ∈ (ℵ‘suc 𝐴))
33	21, 32	jca 511	. 2 ⊢ (((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴)) → ((ℵ‘𝐴) ∈ (card‘𝐵) ∧ (card‘𝐵) ∈ (ℵ‘suc 𝐴)))
34	3, 33	mto 197	1 ⊢ ¬ ((ℵ‘𝐴) ≺ 𝐵 ∧ 𝐵 ≺ (ℵ‘suc 𝐴))

Syntax hints:  ¬ wn 3   ↔ wb 206   ∧ wa 395   = wceq 1542   ∈ wcel 2114   class class class wbr 5100  dom cdm 5634  Oncon0 6327  suc csuc 6329  ‘cfv 6502   ≈ cen 8894   ≼ cdom 8895   ≺ csdm 8896  cardccrd 9861  ℵcale 9862

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5226  ax-sep 5245  ax-nul 5255  ax-pow 5314  ax-pr 5381  ax-un 7692  ax-inf2 9564

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rmo 3352  df-reu 3353  df-rab 3402  df-v 3444  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4288  df-if 4482  df-pw 4558  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-int 4905  df-iun 4950  df-br 5101  df-opab 5163  df-mpt 5182  df-tr 5208  df-id 5529  df-eprel 5534  df-po 5542  df-so 5543  df-fr 5587  df-se 5588  df-we 5589  df-xp 5640  df-rel 5641  df-cnv 5642  df-co 5643  df-dm 5644  df-rn 5645  df-res 5646  df-ima 5647  df-pred 6269  df-ord 6330  df-on 6331  df-lim 6332  df-suc 6333  df-iota 6458  df-fun 6504  df-fn 6505  df-f 6506  df-f1 6507  df-fo 6508  df-f1o 6509  df-fv 6510  df-isom 6511  df-riota 7327  df-ov 7373  df-om 7821  df-2nd 7946  df-frecs 8235  df-wrecs 8266  df-recs 8315  df-rdg 8353  df-1o 8409  df-er 8647  df-en 8898  df-dom 8899  df-sdom 8900  df-fin 8901  df-oi 9429  df-har 9476  df-card 9865  df-aleph 9866

This theorem is referenced by:  alephsucdom  10003  alephsucpw2  10035  alephgch  10599  winalim2  10621  aleph1re  16184