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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 5087 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ 𝐴 | |
| 2 | ssexg 4272 | . 2 ⊢ (((𝐴 ↾ 𝐵) ⊆ 𝐴 ∧ 𝐴 ∈ 𝑉) → (𝐴 ↾ 𝐵) ∈ V) | |
| 3 | 1, 2 | mpan 428 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ↾ 𝐵) ∈ V) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 Vcvv 2821 ⊆ wss 3220 ↾ cres 4776 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4249 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 df-ss 3233 df-res 4786 |
| This theorem is used by: resex 5104 offres 6368 ressuppss 6494 resixp 7015 seqf1oglem2 10970 climres 12085 setsvalg 13431 setsex 13433 setsslid 13452 gzsumsplit1r 13764 znval 15020 znle 15021 znbaslemnn 15023 znleval 15037 uhgrspanop 16621 upgrspanop 16622 umgrspanop 16623 usgrspanop 16624 eupthvdres 16814 eupth2lem3fi 16815 eupth2lembfi 16816 |
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