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Theorem bj-pr2ex 34229
Description: Sethood of the second projection. (Contributed by BJ, 6-Oct-2018.)
Assertion
Ref Expression
bj-pr2ex (𝐴𝑉 → pr2 𝐴 ∈ V)

Proof of Theorem bj-pr2ex
StepHypRef Expression
1 df-bj-pr2 34224 . 2 pr2 𝐴 = (1o Proj 𝐴)
2 bj-projex 34204 . 2 (𝐴𝑉 → (1o Proj 𝐴) ∈ V)
31, 2eqeltrid 2914 1 (𝐴𝑉 → pr2 𝐴 ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2105  Vcvv 3492  1oc1o 8084   Proj bj-cproj 34199  pr2 bj-cpr2 34223
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1787  ax-4 1801  ax-5 1902  ax-6 1961  ax-7 2006  ax-8 2107  ax-9 2115  ax-10 2136  ax-11 2151  ax-12 2167  ax-ext 2790  ax-rep 5181  ax-sep 5194  ax-nul 5201  ax-pr 5320  ax-un 7450
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 842  df-3an 1081  df-tru 1531  df-fal 1541  df-ex 1772  df-nf 1776  df-sb 2061  df-mo 2615  df-eu 2647  df-clab 2797  df-cleq 2811  df-clel 2890  df-nfc 2960  df-ral 3140  df-rex 3141  df-rab 3144  df-v 3494  df-sbc 3770  df-csb 3881  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-nul 4289  df-if 4464  df-sn 4558  df-pr 4560  df-op 4564  df-uni 4831  df-br 5058  df-opab 5120  df-xp 5554  df-cnv 5556  df-dm 5558  df-rn 5559  df-res 5560  df-ima 5561  df-bj-proj 34200  df-bj-pr2 34224
This theorem is referenced by:  bj-2uplex  34231
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