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Theorem scottrankd 9862
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 scottex2 9859 . . . 4 Scott 𝐴 ∈ V
21rankval4 9827 . . 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 485 . . . . . 6 ((𝜑𝑥 ∈ Scott 𝐴) → 𝐵 ∈ Scott 𝐴)
6 simpr 489 . . . . . 6 ((𝜑𝑥 ∈ Scott 𝐴) → 𝑥 ∈ Scott 𝐴)
75, 6scottelrankd 9861 . . . . 5 ((𝜑𝑥 ∈ Scott 𝐴) → (rank‘𝐵) ⊆ (rank‘𝑥))
86, 5scottelrankd 9861 . . . . 5 ((𝜑𝑥 ∈ Scott 𝐴) → (rank‘𝑥) ⊆ (rank‘𝐵))
97, 8eqssd 3956 . . . 4 ((𝜑𝑥 ∈ Scott 𝐴) → (rank‘𝐵) = (rank‘𝑥))
109suceqd 6417 . . 3 ((𝜑𝑥 ∈ Scott 𝐴) → suc (rank‘𝐵) = suc (rank‘𝑥))
1110iuneq2dv 4976 . 2 (𝜑 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥))
124ne0d 4297 . . 3 (𝜑 → Scott 𝐴 ≠ ∅)
13 iunconst 4961 . . 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 2806 1 (𝜑 → (rank‘Scott 𝐴) = suc (rank‘𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1563  wcel 2145  wne 2960  c0 4288   ciun 4951  suc csuc 6351  cfv 6525  rankcrnk 9723  Scott cscott 9845
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-rep 5231  ax-sep 5250  ax-nul 5260  ax-pow 5326  ax-pr 5394  ax-un 7722  ax-reg 9542  ax-inf2 9598
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-reu 3371  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-pss 3927  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-int 4908  df-iun 4953  df-br 5105  df-opab 5167  df-mpt 5186  df-tr 5212  df-id 5546  df-eprel 5551  df-po 5559  df-so 5560  df-fr 5604  df-we 5606  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6291  df-ord 6352  df-on 6353  df-lim 6354  df-suc 6355  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532  df-fv 6533  df-ov 7403  df-om 7851  df-2nd 7975  df-frecs 8266  df-wrecs 8297  df-recs 8346  df-rdg 8385  df-r1 9724  df-rank 9725  df-scott 9846
This theorem is referenced by:  gruscottcld  44818
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