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| Mirrors > Home > ILE Home > Th. List > fvres | GIF version | ||
| Description: The value of a restricted function. (Contributed by NM, 2-Aug-1994.) |
| Ref | Expression |
|---|---|
| fvres | ⊢ (𝐴 ∈ 𝐵 → ((𝐹 ↾ 𝐵)‘𝐴) = (𝐹‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2824 | . . . . 5 ⊢ 𝑥 ∈ V | |
| 2 | 1 | brres 5069 | . . . 4 ⊢ (𝐴(𝐹 ↾ 𝐵)𝑥 ↔ (𝐴𝐹𝑥 ∧ 𝐴 ∈ 𝐵)) |
| 3 | 2 | rbaib 933 | . . 3 ⊢ (𝐴 ∈ 𝐵 → (𝐴(𝐹 ↾ 𝐵)𝑥 ↔ 𝐴𝐹𝑥)) |
| 4 | 3 | iotabidv 5360 | . 2 ⊢ (𝐴 ∈ 𝐵 → (℩𝑥𝐴(𝐹 ↾ 𝐵)𝑥) = (℩𝑥𝐴𝐹𝑥)) |
| 5 | df-fv 5385 | . 2 ⊢ ((𝐹 ↾ 𝐵)‘𝐴) = (℩𝑥𝐴(𝐹 ↾ 𝐵)𝑥) | |
| 6 | df-fv 5385 | . 2 ⊢ (𝐹‘𝐴) = (℩𝑥𝐴𝐹𝑥) | |
| 7 | 4, 5, 6 | 3eqtr4g 2296 | 1 ⊢ (𝐴 ∈ 𝐵 → ((𝐹 ↾ 𝐵)‘𝐴) = (𝐹‘𝐴)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ∈ wcel 2209 class class class wbr 4130 ↾ cres 4776 ℩cio 5335 ‘cfv 5377 |
| 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-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-br 4131 df-opab 4193 df-xp 4780 df-res 4786 df-iota 5337 df-fv 5385 |
| This theorem is used by: fvresd 5720 funssfv 5721 feqresmpt 5757 fvreseq 5812 respreima 5836 ffvresb 5871 fnressn 5901 fressnfv 5902 fvresi 5908 fvunsng 5909 fvsnun1 5912 fvsnun2 5913 fsnunfv 5916 funfvima 5950 isoresbr 6015 isores3 6021 isoini2 6025 ovres 6229 ofres 6317 offres 6368 fo1stresm 6395 fo2ndresm 6396 fo2ndf 6463 f1o2ndf1 6464 smores 6563 smores2 6565 tfrlem1 6579 rdgival 6653 frec0g 6668 freccllem 6673 frecsuclem 6677 frecrdg 6679 resixp 7015 djulclr 7389 djurclr 7390 djur 7409 updjudhcoinlf 7420 updjudhcoinrg 7421 updjud 7422 finomni 7480 exmidfodomrlemrALT 7555 addpiord 7683 mulpiord 7684 suplocexprlemell 8080 fseq1p1m1 10501 seq3feq2 10913 seqf1oglem2 10957 hashf1lem1 11285 seq3coll 11294 pfxccat1 11474 shftidt 11598 climres 12069 fisumss 12159 isumclim3 12190 fsum2dlemstep 12201 fprodssdc 12357 fprod2dlemstep 12389 reeff1 12467 eucalgcvga 12836 eucalg 12837 strslfv2d 13395 setsslid 13403 setsslnid 13404 resmhm 13794 resghm 14063 gsummptfidmadd 14161 gsumsubmclfi 14163 rngmgpf 14236 mgpf 14315 znf1o 14986 cnptopresti 15339 cnptoprest 15340 lmres 15349 tx1cn 15370 tx2cn 15371 cnmpt1st 15389 cnmpt2nd 15390 remetdval 15648 rescncf 15682 limcdifap 15763 limcresi 15767 plyreres 15865 reeff1o 15874 reefiso 15878 ioocosf1o 15955 relogcl 15963 relogef 15965 logltb 15975 mpodvdsmulf1o 16104 fsumdvdsmul 16105 djucllem 16828 012of 17023 2o01f 17024 |
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