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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-pr2ex | Structured version Visualization version GIF version | ||
| Description: Sethood of the second projection. (Contributed by BJ, 6-Oct-2018.) |
| Ref | Expression |
|---|---|
| bj-pr2ex | ⊢ (𝐴 ∈ 𝑉 → pr2 𝐴 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-bj-pr2 37048 | . 2 ⊢ pr2 𝐴 = (1o Proj 𝐴) | |
| 2 | bj-projex 37028 | . 2 ⊢ (𝐴 ∈ 𝑉 → (1o Proj 𝐴) ∈ V) | |
| 3 | 1, 2 | eqeltrid 2835 | 1 ⊢ (𝐴 ∈ 𝑉 → pr2 𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2111 Vcvv 3436 1oc1o 8378 Proj bj-cproj 37023 pr2 bj-cpr2 37047 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5217 ax-sep 5234 ax-nul 5244 ax-pr 5370 ax-un 7668 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4476 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-opab 5154 df-xp 5622 df-cnv 5624 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-bj-proj 37024 df-bj-pr2 37048 |
| This theorem is referenced by: bj-2uplex 37055 |
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