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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 36989 | . 2 ⊢ pr1 𝐴 = (∅ Proj 𝐴) | |
| 2 | bj-projex 36983 | . 2 ⊢ (𝐴 ∈ 𝑉 → (∅ Proj 𝐴) ∈ V) | |
| 3 | 1, 2 | eqeltrid 2832 | 1 ⊢ (𝐴 ∈ 𝑉 → pr1 𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2109 Vcvv 3447 ∅c0 4296 Proj bj-cproj 36978 pr1 bj-cpr1 36988 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pr 5387 ax-un 7711 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-br 5108 df-opab 5170 df-xp 5644 df-cnv 5646 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-bj-proj 36979 df-bj-pr1 36989 |
| This theorem is referenced by: bj-1uplex 36996 bj-2uplex 37010 |
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