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Theorem rankr1ai 8699
Description: One direction of rankr1a 8737. (Contributed by Mario Carneiro, 28-May-2013.) (Revised by Mario Carneiro, 17-Nov-2014.)
Assertion
Ref Expression
rankr1ai (𝐴 ∈ (𝑅1𝐵) → (rank‘𝐴) ∈ 𝐵)

Proof of Theorem rankr1ai
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 elfvdm 6258 . . 3 (𝐴 ∈ (𝑅1𝐵) → 𝐵 ∈ dom 𝑅1)
2 r1val1 8687 . . . . . 6 (𝐵 ∈ dom 𝑅1 → (𝑅1𝐵) = 𝑥𝐵 𝒫 (𝑅1𝑥))
32eleq2d 2716 . . . . 5 (𝐵 ∈ dom 𝑅1 → (𝐴 ∈ (𝑅1𝐵) ↔ 𝐴 𝑥𝐵 𝒫 (𝑅1𝑥)))
4 eliun 4556 . . . . 5 (𝐴 𝑥𝐵 𝒫 (𝑅1𝑥) ↔ ∃𝑥𝐵 𝐴 ∈ 𝒫 (𝑅1𝑥))
53, 4syl6bb 276 . . . 4 (𝐵 ∈ dom 𝑅1 → (𝐴 ∈ (𝑅1𝐵) ↔ ∃𝑥𝐵 𝐴 ∈ 𝒫 (𝑅1𝑥)))
6 r1funlim 8667 . . . . . . . . . . 11 (Fun 𝑅1 ∧ Lim dom 𝑅1)
76simpri 477 . . . . . . . . . 10 Lim dom 𝑅1
8 limord 5822 . . . . . . . . . 10 (Lim dom 𝑅1 → Ord dom 𝑅1)
97, 8ax-mp 5 . . . . . . . . 9 Ord dom 𝑅1
10 ordtr1 5805 . . . . . . . . 9 (Ord dom 𝑅1 → ((𝑥𝐵𝐵 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1))
119, 10ax-mp 5 . . . . . . . 8 ((𝑥𝐵𝐵 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1)
1211ancoms 468 . . . . . . 7 ((𝐵 ∈ dom 𝑅1𝑥𝐵) → 𝑥 ∈ dom 𝑅1)
13 r1sucg 8670 . . . . . . . 8 (𝑥 ∈ dom 𝑅1 → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1𝑥))
1413eleq2d 2716 . . . . . . 7 (𝑥 ∈ dom 𝑅1 → (𝐴 ∈ (𝑅1‘suc 𝑥) ↔ 𝐴 ∈ 𝒫 (𝑅1𝑥)))
1512, 14syl 17 . . . . . 6 ((𝐵 ∈ dom 𝑅1𝑥𝐵) → (𝐴 ∈ (𝑅1‘suc 𝑥) ↔ 𝐴 ∈ 𝒫 (𝑅1𝑥)))
16 ordsson 7031 . . . . . . . . . 10 (Ord dom 𝑅1 → dom 𝑅1 ⊆ On)
179, 16ax-mp 5 . . . . . . . . 9 dom 𝑅1 ⊆ On
1817, 12sseldi 3634 . . . . . . . 8 ((𝐵 ∈ dom 𝑅1𝑥𝐵) → 𝑥 ∈ On)
19 rabid 3145 . . . . . . . . 9 (𝑥 ∈ {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ↔ (𝑥 ∈ On ∧ 𝐴 ∈ (𝑅1‘suc 𝑥)))
20 intss1 4524 . . . . . . . . 9 (𝑥 ∈ {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} → {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥)
2119, 20sylbir 225 . . . . . . . 8 ((𝑥 ∈ On ∧ 𝐴 ∈ (𝑅1‘suc 𝑥)) → {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥)
2218, 21sylan 487 . . . . . . 7 (((𝐵 ∈ dom 𝑅1𝑥𝐵) ∧ 𝐴 ∈ (𝑅1‘suc 𝑥)) → {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥)
2322ex 449 . . . . . 6 ((𝐵 ∈ dom 𝑅1𝑥𝐵) → (𝐴 ∈ (𝑅1‘suc 𝑥) → {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥))
2415, 23sylbird 250 . . . . 5 ((𝐵 ∈ dom 𝑅1𝑥𝐵) → (𝐴 ∈ 𝒫 (𝑅1𝑥) → {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥))
2524reximdva 3046 . . . 4 (𝐵 ∈ dom 𝑅1 → (∃𝑥𝐵 𝐴 ∈ 𝒫 (𝑅1𝑥) → ∃𝑥𝐵 {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥))
265, 25sylbid 230 . . 3 (𝐵 ∈ dom 𝑅1 → (𝐴 ∈ (𝑅1𝐵) → ∃𝑥𝐵 {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥))
271, 26mpcom 38 . 2 (𝐴 ∈ (𝑅1𝐵) → ∃𝑥𝐵 {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥)
28 r1elwf 8697 . . . . . . 7 (𝐴 ∈ (𝑅1𝐵) → 𝐴 (𝑅1 “ On))
29 rankvalb 8698 . . . . . . 7 (𝐴 (𝑅1 “ On) → (rank‘𝐴) = {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)})
3028, 29syl 17 . . . . . 6 (𝐴 ∈ (𝑅1𝐵) → (rank‘𝐴) = {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)})
3130sseq1d 3665 . . . . 5 (𝐴 ∈ (𝑅1𝐵) → ((rank‘𝐴) ⊆ 𝑥 {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥))
3231adantr 480 . . . 4 ((𝐴 ∈ (𝑅1𝐵) ∧ 𝑥𝐵) → ((rank‘𝐴) ⊆ 𝑥 {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥))
33 rankon 8696 . . . . . . 7 (rank‘𝐴) ∈ On
3417, 1sseldi 3634 . . . . . . 7 (𝐴 ∈ (𝑅1𝐵) → 𝐵 ∈ On)
35 ontr2 5810 . . . . . . 7 (((rank‘𝐴) ∈ On ∧ 𝐵 ∈ On) → (((rank‘𝐴) ⊆ 𝑥𝑥𝐵) → (rank‘𝐴) ∈ 𝐵))
3633, 34, 35sylancr 696 . . . . . 6 (𝐴 ∈ (𝑅1𝐵) → (((rank‘𝐴) ⊆ 𝑥𝑥𝐵) → (rank‘𝐴) ∈ 𝐵))
3736expcomd 453 . . . . 5 (𝐴 ∈ (𝑅1𝐵) → (𝑥𝐵 → ((rank‘𝐴) ⊆ 𝑥 → (rank‘𝐴) ∈ 𝐵)))
3837imp 444 . . . 4 ((𝐴 ∈ (𝑅1𝐵) ∧ 𝑥𝐵) → ((rank‘𝐴) ⊆ 𝑥 → (rank‘𝐴) ∈ 𝐵))
3932, 38sylbird 250 . . 3 ((𝐴 ∈ (𝑅1𝐵) ∧ 𝑥𝐵) → ( {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥 → (rank‘𝐴) ∈ 𝐵))
4039rexlimdva 3060 . 2 (𝐴 ∈ (𝑅1𝐵) → (∃𝑥𝐵 {𝑥 ∈ On ∣ 𝐴 ∈ (𝑅1‘suc 𝑥)} ⊆ 𝑥 → (rank‘𝐴) ∈ 𝐵))
4127, 40mpd 15 1 (𝐴 ∈ (𝑅1𝐵) → (rank‘𝐴) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383   = wceq 1523  wcel 2030  wrex 2942  {crab 2945  wss 3607  𝒫 cpw 4191   cuni 4468   cint 4507   ciun 4552  dom cdm 5143  cima 5146  Ord word 5760  Oncon0 5761  Lim wlim 5762  suc csuc 5763  Fun wfun 5920  cfv 5926  𝑅1cr1 8663  rankcrnk 8664
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-reu 2948  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-om 7108  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-r1 8665  df-rank 8666
This theorem is referenced by:  rankr1ag  8703  tcrank  8785  dfac12lem1  9003  dfac12lem2  9004  r1limwun  9596  inatsk  9638  aomclem4  37944
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