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Theorem bj-pr1ex 37496
Description: Sethood of the first projection. (Contributed by BJ, 6-Oct-2018.)
Assertion
Ref Expression
bj-pr1ex (𝐴𝑉 → pr1 𝐴 ∈ V)

Proof of Theorem bj-pr1ex
StepHypRef Expression
1 df-bj-pr1 37491 . 2 pr1 𝐴 = (∅ Proj 𝐴)
2 bj-projex 37485 . 2 (𝐴𝑉 → (∅ Proj 𝐴) ∈ V)
31, 2eqeltrid 2868 1 (𝐴𝑉 → pr1 𝐴 ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2144  Vcvv 3456  c0 4287   Proj bj-cproj 37480  pr1 bj-cpr1 37490
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1817  ax-4 1831  ax-5 1932  ax-6 1989  ax-7 2030  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2214  ax-ext 2736  ax-rep 5229  ax-sep 5248  ax-pr 5392  ax-un 7720
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1101  df-tru 1565  df-fal 1575  df-ex 1802  df-nf 1806  df-sb 2093  df-mo 2568  df-clab 2743  df-cleq 2756  df-clel 2839  df-nfc 2913  df-ral 3079  df-rex 3089  df-rab 3417  df-v 3458  df-sbc 3747  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5103  df-opab 5165  df-xp 5655  df-cnv 5657  df-dm 5659  df-rn 5660  df-res 5661  df-ima 5662  df-bj-proj 37481  df-bj-pr1 37491
This theorem is referenced by:  bj-1uplex  37498  bj-2uplex  37512
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