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Theorem scottrankd 9892
Description: Rank of a nonempty Scott's trick set. (Contributed by Rohan Ridenour, 11-Aug-2023.)
Hypothesis
Ref Expression
scottrankd.1 (𝜑𝐵 ∈ Scott 𝐴)
Assertion
Ref Expression
scottrankd (𝜑 → (rank‘Scott 𝐴) = suc (rank‘𝐵))

Proof of Theorem scottrankd
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 scottex 9876 . . . 4 Scott 𝐴 ∈ V
21rankval4 9853 . . 3 (rank‘Scott 𝐴) = 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥)
32a1i 11 . 2 (𝜑 → (rank‘Scott 𝐴) = 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥))
4 scottrankd.1 . . . . . . 7 (𝜑𝐵 ∈ Scott 𝐴)
54adantr 486 . . . . . 6 ((𝜑𝑥 ∈ Scott 𝐴) → 𝐵 ∈ Scott 𝐴)
6 simpr 490 . . . . . 6 ((𝜑𝑥 ∈ Scott 𝐴) → 𝑥 ∈ Scott 𝐴)
75, 6scottelrankd 9891 . . . . 5 ((𝜑𝑥 ∈ Scott 𝐴) → (rank‘𝐵) ⊆ (rank‘𝑥))
86, 5scottelrankd 9891 . . . . 5 ((𝜑𝑥 ∈ Scott 𝐴) → (rank‘𝑥) ⊆ (rank‘𝐵))
97, 8eqssd 3951 . . . 4 ((𝜑𝑥 ∈ Scott 𝐴) → (rank‘𝐵) = (rank‘𝑥))
109suceqd 6429 . . 3 ((𝜑𝑥 ∈ Scott 𝐴) → suc (rank‘𝐵) = suc (rank‘𝑥))
1110iuneq2dv 4979 . 2 (𝜑 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥))
124ne0d 4291 . . 3 (𝜑 → Scott 𝐴 ≠ ∅)
13 iunconst 4964 . . 3 (Scott 𝐴 ≠ ∅ → 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = suc (rank‘𝐵))
1412, 13syl 18 . 2 (𝜑 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = suc (rank‘𝐵))
153, 11, 143eqtr2d 2803 1 (𝜑 → (rank‘Scott 𝐴) = suc (rank‘𝐵))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 401   = wceq 1570  wcel 2145  wne 2957  c0 4282   ciun 4954  suc csuc 6363  cfv 6537  rankcrnk 9749  Scott cscott 9871
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2734  ax-rep 5236  ax-sep 5255  ax-nul 5267  ax-pow 5334  ax-pr 5402  ax-un 7740  ax-reg 9568  ax-inf2 9624
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3079  df-rex 3089  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3743  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-pss 3922  df-nul 4283  df-if 4486  df-pw 4562  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-int 4911  df-iun 4956  df-br 5108  df-opab 5172  df-mpt 5191  df-tr 5217  df-id 5554  df-eprel 5559  df-po 5567  df-so 5568  df-fr 5612  df-we 5614  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-pred 6303  df-ord 6364  df-on 6365  df-lim 6366  df-suc 6367  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-ov 7420  df-om 7867  df-2nd 7991  df-frecs 8284  df-wrecs 8315  df-recs 8364  df-rdg 8403  df-r1 9750  df-rank 9751  df-scott 9872
This theorem is used by:  rankscott  35643  rankscottu  35644  gruscottcld  45081
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