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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 36988 | . 2 ⊢ pr2 𝐴 = (1o Proj 𝐴) | |
| 2 | bj-projex 36968 | . 2 ⊢ (𝐴 ∈ 𝑉 → (1o Proj 𝐴) ∈ V) | |
| 3 | 1, 2 | eqeltrid 2832 | 1 ⊢ (𝐴 ∈ 𝑉 → pr2 𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2109 Vcvv 3438 1oc1o 8388 Proj bj-cproj 36963 pr2 bj-cpr2 36987 |
| 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 5221 ax-sep 5238 ax-nul 5248 ax-pr 5374 ax-un 7675 |
| 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 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4479 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-br 5096 df-opab 5158 df-xp 5629 df-cnv 5631 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-bj-proj 36964 df-bj-pr2 36988 |
| This theorem is referenced by: bj-2uplex 36995 |
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