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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 34308 | . 2 ⊢ pr1 𝐴 = (∅ Proj 𝐴) | |
2 | bj-projex 34302 | . 2 ⊢ (𝐴 ∈ 𝑉 → (∅ Proj 𝐴) ∈ V) | |
3 | 1, 2 | eqeltrid 2917 | 1 ⊢ (𝐴 ∈ 𝑉 → pr1 𝐴 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2110 Vcvv 3494 ∅c0 4290 Proj bj-cproj 34297 pr1 bj-cpr1 34307 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-rep 5182 ax-sep 5195 ax-nul 5202 ax-pr 5321 ax-un 7455 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-fal 1546 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-xp 5555 df-cnv 5557 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-bj-proj 34298 df-bj-pr1 34308 |
This theorem is referenced by: bj-1uplex 34315 bj-2uplex 34329 |
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