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| Mirrors > Home > ILE Home > Th. List > resexg | GIF version | ||
| Description: The restriction of a set is a set. (Contributed by NM, 28-Mar-1998.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
| Ref | Expression |
|---|---|
| resexg | ⊢ (𝐴 ∈ 𝑉 → (𝐴 ↾ 𝐵) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | resss 5062 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ 𝐴 | |
| 2 | ssexg 4249 | . 2 ⊢ (((𝐴 ↾ 𝐵) ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → (𝐴 ↾ 𝐵) ∈ V) | |
| 3 | 1, 2 | mpan 424 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ↾ 𝐵) ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2203 Vcvv 2813 ⊆ wss 3211 ↾ cres 4751 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-sep 4228 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 df-in 3217 df-ss 3224 df-res 4761 |
| This theorem is referenced by: resex 5079 offres 6328 ressuppss 6454 resixp 6968 seqf1oglem2 10882 climres 11988 setsvalg 13242 setsex 13244 setsslid 13263 gsumsplit1r 13611 znval 14784 znle 14785 znbaslemnn 14787 znleval 14801 uhgrspanop 16277 upgrspanop 16278 umgrspanop 16279 usgrspanop 16280 eupthvdres 16470 eupth2lem3fi 16471 eupth2lembfi 16472 |
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