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Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-pr1ex | Structured version Visualization version GIF version |
Description: Sethood of the first projection. (Contributed by BJ, 6-Oct-2018.) |
Ref | Expression |
---|---|
bj-pr1ex | ⊢ (𝐴 ∈ 𝑉 → pr1 𝐴 ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-bj-pr1 35118 | . 2 ⊢ pr1 𝐴 = (∅ Proj 𝐴) | |
2 | bj-projex 35112 | . 2 ⊢ (𝐴 ∈ 𝑉 → (∅ Proj 𝐴) ∈ V) | |
3 | 1, 2 | eqeltrid 2843 | 1 ⊢ (𝐴 ∈ 𝑉 → pr1 𝐴 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2108 Vcvv 3422 ∅c0 4253 Proj bj-cproj 35107 pr1 bj-cpr1 35117 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-xp 5586 df-cnv 5588 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-bj-proj 35108 df-bj-pr1 35118 |
This theorem is referenced by: bj-1uplex 35125 bj-2uplex 35139 |
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