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Theorem brpermmodelcnv 45827
Description: Ordinary membership expressed in terms of the permutation model's membership relation. (Contributed by Eric Schmidt, 6-Nov-2025.)
Hypotheses
Ref Expression
permmodel.1 𝐹:V–1-1-onto→V
permmodel.2 𝑅 = (𝐹 ∘ E )
brpermmodel.3 𝐴 ∈ V
brpermmodel.4 𝐵 ∈ V
Assertion
Ref Expression
brpermmodelcnv (𝐴𝑅(𝐹𝐵) ↔ 𝐴𝐵)

Proof of Theorem brpermmodelcnv
StepHypRef Expression
1 permmodel.1 . . 3 𝐹:V–1-1-onto→V
2 permmodel.2 . . 3 𝑅 = (𝐹 ∘ E )
3 brpermmodel.3 . . 3 𝐴 ∈ V
4 fvex 6891 . . 3 (𝐹𝐵) ∈ V
51, 2, 3, 4brpermmodel 45826 . 2 (𝐴𝑅(𝐹𝐵) ↔ 𝐴 ∈ (𝐹‘(𝐹𝐵)))
6 brpermmodel.4 . . . 4 𝐵 ∈ V
7 f1ocnvfv2 7278 . . . 4 ((𝐹:V–1-1-onto→V ∧ 𝐵 ∈ V) → (𝐹‘(𝐹𝐵)) = 𝐵)
81, 6, 7mp2an 705 . . 3 (𝐹‘(𝐹𝐵)) = 𝐵
98eleq2i 2852 . 2 (𝐴 ∈ (𝐹‘(𝐹𝐵)) ↔ 𝐴𝐵)
105, 9bitri 278 1 (𝐴𝑅(𝐹𝐵) ↔ 𝐴𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wb 209   = wceq 1570  wcel 2145  Vcvv 3450   class class class wbr 5103   E cep 5554  ccnv 5654  ccom 5659  1-1-ontowf1o 6532  cfv 6533
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 2213  ax-ext 2732  ax-sep 5251  ax-nul 5263  ax-pr 5398
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-id 5550  df-eprel 5555  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6489  df-fun 6535  df-fn 6536  df-f 6537  df-f1 6538  df-fo 6539  df-f1o 6540  df-fv 6541
This theorem is used by:  permaxsep  45830  permaxnul  45831  permaxpow  45832  permaxpr  45833  permaxun  45834  permaxinf2lem  45835  permac8prim  45837
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