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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 37585 | . 2 ⊢ pr1 𝐴 = (∅ Proj 𝐴) | |
| 2 | bj-projex 37579 | . 2 ⊢ (𝐴 ∈ 𝑉 → (∅ Proj 𝐴) ∈ V) | |
| 3 | 1, 2 | eqeltrid 2874 | 1 ⊢ (𝐴 ∈ 𝑉 → pr1 𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2150 Vcvv 3462 ∅c0 4294 Proj bj-cproj 37574 pr1 bj-cpr1 37584 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-pr 5408 ax-un 7736 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ral 3087 df-rex 3097 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-opab 5179 df-xp 5671 df-cnv 5673 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-bj-proj 37575 df-bj-pr1 37585 |
| This theorem is referenced by: bj-1uplex 37592 bj-2uplex 37606 |
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