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| Mirrors > Home > ILE Home > Th. List > fnssres | GIF version | ||
| Description: Restriction of a function with a subclass of its domain. (Contributed by NM, 2-Aug-1994.) |
| Ref | Expression |
|---|---|
| fnssres | ⊢ ((𝐹 Fn 𝐴 ∧ 𝐵 ⊆ 𝐴) → (𝐹 ↾ 𝐵) Fn 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnssresb 5451 | . 2 ⊢ (𝐹 Fn 𝐴 → ((𝐹 ↾ 𝐵) Fn 𝐵 ↔ 𝐵 ⊆ 𝐴)) | |
| 2 | 1 | biimpar 297 | 1 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐵 ⊆ 𝐴) → (𝐹 ↾ 𝐵) Fn 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ⊆ wss 3201 ↾ cres 4733 Fn wfn 5328 |
| 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-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-br 4094 df-opab 4156 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-res 4743 df-fun 5335 df-fn 5336 |
| This theorem is referenced by: fnssresd 5453 fnresin1 5454 fnresin2 5455 fssres 5520 fvreseq 5759 fnreseql 5766 ffvresb 5818 fnressn 5848 ofres 6259 tfrlem1 6517 frecrdg 6617 resixp 6945 resfnfinfinss 7181 suplocexprlemell 7976 seq3feq2 10782 seqf1oglem2 10826 reeff1 12322 rngmgpf 14012 mgpf 14086 upxp 15063 uptx 15065 cnmpt1st 15079 cnmpt2nd 15080 ioocosf1o 15645 mpodvdsmulf1o 15784 |
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