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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 10972 climres 12088 setsvalg 13434 setsex 13436 setsslid 13455 gzsumsplit1r 13768 znval 15055 znle 15056 znbaslemnn 15058 znleval 15072 uhgrspanop 16689 upgrspanop 16690 umgrspanop 16691 usgrspanop 16692 eupthvdres 16882 eupth2lem3fi 16883 eupth2lembfi 16884 |
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