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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 37369 | . 2 ⊢ pr1 𝐴 = (∅ Proj 𝐴) | |
| 2 | bj-projex 37363 | . 2 ⊢ (𝐴 ∈ 𝑉 → (∅ Proj 𝐴) ∈ V) | |
| 3 | 1, 2 | eqeltrid 2845 | 1 ⊢ (𝐴 ∈ 𝑉 → pr1 𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2121 Vcvv 3433 ∅c0 4264 Proj bj-cproj 37358 pr1 bj-cpr1 37368 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-pr 5365 ax-un 7682 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4265 df-if 4458 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-br 5076 df-opab 5138 df-xp 5627 df-cnv 5629 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-bj-proj 37359 df-bj-pr1 37369 |
| This theorem is referenced by: bj-1uplex 37376 bj-2uplex 37390 |
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