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| Mirrors > Home > MPE Home > Th. List > cusgrexilem1 | Structured version Visualization version GIF version | ||
| Description: Lemma 1 for cusgrexi 29802. (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 5349 | . . 3 ⊢ (𝑉 ∈ 𝑊 → 𝒫 𝑉 ∈ V) | |
| 3 | 1, 2 | rabexd 5310 | . 2 ⊢ (𝑉 ∈ 𝑊 → 𝑃 ∈ V) |
| 4 | resiexg 7905 | . 2 ⊢ (𝑃 ∈ V → ( I ↾ 𝑃) ∈ V) | |
| 5 | 3, 4 | syl 18 | 1 ⊢ (𝑉 ∈ 𝑊 → ( I ↾ 𝑃) ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2143 {crab 3416 Vcvv 3455 𝒫 cpw 4562 I cid 5555 ↾ cres 5663 ‘cfv 6536 2c2 12299 ♯chash 14371 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-res 5673 |
| This theorem is used by: usgrexi 29800 cusgrexi 29802 cusgrexg 29803 structtousgr 29804 structtocusgr 29805 |
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