Theorem scottrankd 9875

Description: Rank of a nonempty Scott's trick set. (Contributed by Rohan Ridenour, 11-Aug-2023.)

Hypothesis

Ref	Expression
scottrankd.1	⊢ (𝜑 → 𝐵 ∈ 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.

Step	Hyp	Ref	Expression
1		scottex2 9872	. . . 4 ⊢ Scott 𝐴 ∈ V
2	1	rankval4 9840	. . 3 ⊢ (rank‘Scott 𝐴) = ∪ 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥)
3	2	a1i 11	. 2 ⊢ (𝜑 → (rank‘Scott 𝐴) = ∪ 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥))
4		scottrankd.1	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ Scott 𝐴)
5	4	adantr 485	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ Scott 𝐴) → 𝐵 ∈ Scott 𝐴)
6		simpr 489	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ Scott 𝐴) → 𝑥 ∈ Scott 𝐴)
7	5, 6	scottelrankd 9874	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ Scott 𝐴) → (rank‘𝐵) ⊆ (rank‘𝑥))
8	6, 5	scottelrankd 9874	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ Scott 𝐴) → (rank‘𝑥) ⊆ (rank‘𝐵))
9	7, 8	eqssd 3955	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ Scott 𝐴) → (rank‘𝐵) = (rank‘𝑥))
10	9	suceqd 6430	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ Scott 𝐴) → suc (rank‘𝐵) = suc (rank‘𝑥))
11	10	iuneq2dv 4982	. 2 ⊢ (𝜑 → ∪ 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = ∪ 𝑥 ∈ Scott 𝐴 suc (rank‘𝑥))
12	4	ne0d 4296	. . 3 ⊢ (𝜑 → Scott 𝐴 ≠ ∅)
13		iunconst 4967	. . 3 ⊢ (Scott 𝐴 ≠ ∅ → ∪ 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = suc (rank‘𝐵))
14	12, 13	syl 18	. 2 ⊢ (𝜑 → ∪ 𝑥 ∈ Scott 𝐴 suc (rank‘𝐵) = suc (rank‘𝐵))
15	3, 11, 14	3eqtr2d 2804	1 ⊢ (𝜑 → (rank‘Scott 𝐴) = suc (rank‘𝐵))

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1570   ∈ wcel 2143   ≠ wne 2958  ∅c0 4287  ∪ ciun 4957  suc csuc 6364  ‘cfv 6538  rankcrnk 9736  Scott cscott 9858

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5239  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734  ax-reg 9555  ax-inf2 9611

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-pss 3926  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-int 4914  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-tr 5220  df-id 5558  df-eprel 5563  df-po 5571  df-so 5572  df-fr 5616  df-we 5618  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-pred 6304  df-ord 6365  df-on 6366  df-lim 6367  df-suc 6368  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-ov 7415  df-om 7864  df-2nd 7988  df-frecs 8279  df-wrecs 8310  df-recs 8359  df-rdg 8398  df-r1 9737  df-rank 9738  df-scott 9859

This theorem is referenced by:  rankscott  35503  rankscottu  35504  gruscottcld  44942