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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 5067 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ 𝐴 | |
| 2 | ssexg 4254 | . 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 2205 Vcvv 2815 ⊆ wss 3214 ↾ cres 4756 |
| 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 2216 ax-sep 4233 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-in 3220 df-ss 3227 df-res 4766 |
| This theorem is referenced by: resex 5084 offres 6341 ressuppss 6467 resixp 6981 seqf1oglem2 10906 climres 12013 setsvalg 13326 setsex 13328 setsslid 13347 gsumsplit1r 13661 znval 14910 znle 14911 znbaslemnn 14913 znleval 14927 uhgrspanop 16403 upgrspanop 16404 umgrspanop 16405 usgrspanop 16406 eupthvdres 16596 eupth2lem3fi 16597 eupth2lembfi 16598 |
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