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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 37538 | . 2 ⊢ pr2 𝐴 = (1o Proj 𝐴) | |
| 2 | bj-projex 37518 | . 2 ⊢ (𝐴 ∈ 𝑉 → (1o Proj 𝐴) ∈ V) | |
| 3 | 1, 2 | eqeltrid 2873 | 1 ⊢ (𝐴 ∈ 𝑉 → pr2 𝐴 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2149 Vcvv 3463 1oc1o 8445 Proj bj-cproj 37513 pr2 bj-cpr2 37537 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-sbc 3754 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 4877 df-br 5114 df-opab 5178 df-xp 5668 df-cnv 5670 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-bj-proj 37514 df-bj-pr2 37538 |
| This theorem is referenced by: bj-2uplex 37545 |
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