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| Mirrors > Home > MPE Home > Th. List > cusgrexilem1 | Structured version Visualization version GIF version | ||
| Description: Lemma 1 for cusgrexi 29516. (Contributed by Alexander van der Vekens, 12-Jan-2018.) |
| Ref | Expression |
|---|---|
| usgrexi.p | ⊢ 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2} |
| Ref | Expression |
|---|---|
| cusgrexilem1 | ⊢ (𝑉 ∈ 𝑊 → ( I ↾ 𝑃) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | usgrexi.p | . . 3 ⊢ 𝑃 = {𝑥 ∈ 𝒫 𝑉 ∣ (♯‘𝑥) = 2} | |
| 2 | pwexg 5323 | . . 3 ⊢ (𝑉 ∈ 𝑊 → 𝒫 𝑉 ∈ V) | |
| 3 | 1, 2 | rabexd 5285 | . 2 ⊢ (𝑉 ∈ 𝑊 → 𝑃 ∈ V) |
| 4 | resiexg 7854 | . 2 ⊢ (𝑃 ∈ V → ( I ↾ 𝑃) ∈ V) | |
| 5 | 3, 4 | syl 17 | 1 ⊢ (𝑉 ∈ 𝑊 → ( I ↾ 𝑃) ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 {crab 3399 Vcvv 3440 𝒫 cpw 4554 I cid 5518 ↾ cres 5626 ‘cfv 6492 2c2 12200 ♯chash 14253 |
| 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 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 |
| 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-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-res 5636 |
| This theorem is referenced by: usgrexi 29514 cusgrexi 29516 cusgrexg 29517 structtousgr 29518 structtocusgr 29519 |
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