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Theorem brpermmodelcnv 46102
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(◡𝐹‘𝐵) ↔ 𝐴 ∈ 𝐵)

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 6903 . . 3 (◡𝐹‘𝐵) ∈ V
51, 2, 3, 4brpermmodel 46101 . 2 (𝐴𝑅(◡𝐹‘𝐵) ↔ 𝐴 ∈ (𝐹‘(◡𝐹‘𝐵)))
6 brpermmodel.4 . . . 4 𝐵 ∈ V
7 f1ocnvfv2 7289 . . . 4 ((𝐹:V–1-1-onto→V ∧ 𝐵 ∈ V) → (𝐹‘(◡𝐹‘𝐵)) = 𝐵)
81, 6, 7mp2an 705 . . 3 (𝐹‘(◡𝐹‘𝐵)) = 𝐵
98eleq2i 2852 . 2 (𝐴 ∈ (𝐹‘(◡𝐹‘𝐵)) ↔ 𝐴 ∈ 𝐵)
105, 9bitri 278 1 (𝐴𝑅(◡𝐹‘𝐵) ↔ 𝐴 ∈ 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   ↔ wb 209   = wceq 1569   ∈ wcel 2144  Vcvv 3450   class class class wbr 5102   E cep 5550  ◡ccnv 5650   ∘ ccom 5655  –1-1-onto→wf1o 6542  ‘cfv 6543
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  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-ss 3897  df-dif 4046  df-in 4090  df-un 4150  df-nul 4278  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-id 5546  df-eprel 5551  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-iota 6497  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551
This theorem is used by:  permaxsep  46105  permaxnul  46106  permaxpow  46107  permaxpr  46108  permaxun  46109  permaxinf2lem  46110  permac8prim  46112
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