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Theorem rankrelp 45791
Description: The rank function preserves . (Contributed by Eric Schmidt, 11-Oct-2025.)
Assertion
Ref Expression
rankrelp rank RelPres E , E ( (𝑅1 “ On), On)

Proof of Theorem rankrelp
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 rankf 9780 . 2 rank: (𝑅1 “ On)⟶On
2 rankelb 9810 . . . . 5 (𝑦 (𝑅1 “ On) → (𝑥𝑦 → (rank‘𝑥) ∈ (rank‘𝑦)))
3 epel 5562 . . . . 5 (𝑥 E 𝑦𝑥𝑦)
4 fvex 6895 . . . . . 6 (rank‘𝑦) ∈ V
54epeli 5561 . . . . 5 ((rank‘𝑥) E (rank‘𝑦) ↔ (rank‘𝑥) ∈ (rank‘𝑦))
62, 3, 53imtr4g 299 . . . 4 (𝑦 (𝑅1 “ On) → (𝑥 E 𝑦 → (rank‘𝑥) E (rank‘𝑦)))
76rgen 3080 . . 3 𝑦 (𝑅1 “ On)(𝑥 E 𝑦 → (rank‘𝑥) E (rank‘𝑦))
87rgenw 3082 . 2 𝑥 (𝑅1 “ On)∀𝑦 (𝑅1 “ On)(𝑥 E 𝑦 → (rank‘𝑥) E (rank‘𝑦))
9 df-relp 45774 . 2 (rank RelPres E , E ( (𝑅1 “ On), On) ↔ (rank: (𝑅1 “ On)⟶On ∧ ∀𝑥 (𝑅1 “ On)∀𝑦 (𝑅1 “ On)(𝑥 E 𝑦 → (rank‘𝑥) E (rank‘𝑦))))
101, 8, 9mpbir2an 724 1 rank RelPres E , E ( (𝑅1 “ On), On)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wcel 2145  wral 3078   cuni 4870   class class class wbr 5107   E cep 5558  cima 5662  Oncon0 6361  wf 6533  cfv 6537  𝑅1cr1 9748  rankcrnk 9749   RelPres wrelp 45773
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-sep 5255  ax-nul 5267  ax-pow 5334  ax-pr 5402  ax-un 7740
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-relp 45774
This theorem is used by:  wffr  45792
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