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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 2692 | . . . . 5 ⊢ 𝑥 ∈ V | |
2 | 1 | brres 4833 | . . . 4 ⊢ (𝐴(𝐹 ↾ 𝐵)𝑥 ↔ (𝐴𝐹𝑥 ∧ 𝐴 ∈ 𝐵)) |
3 | 2 | rbaib 907 | . . 3 ⊢ (𝐴 ∈ 𝐵 → (𝐴(𝐹 ↾ 𝐵)𝑥 ↔ 𝐴𝐹𝑥)) |
4 | 3 | iotabidv 5117 | . 2 ⊢ (𝐴 ∈ 𝐵 → (℩𝑥𝐴(𝐹 ↾ 𝐵)𝑥) = (℩𝑥𝐴𝐹𝑥)) |
5 | df-fv 5139 | . 2 ⊢ ((𝐹 ↾ 𝐵)‘𝐴) = (℩𝑥𝐴(𝐹 ↾ 𝐵)𝑥) | |
6 | df-fv 5139 | . 2 ⊢ (𝐹‘𝐴) = (℩𝑥𝐴𝐹𝑥) | |
7 | 4, 5, 6 | 3eqtr4g 2198 | 1 ⊢ (𝐴 ∈ 𝐵 → ((𝐹 ↾ 𝐵)‘𝐴) = (𝐹‘𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1332 ∈ wcel 1481 class class class wbr 3937 ↾ cres 4549 ℩cio 5094 ‘cfv 5131 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-rex 2423 df-v 2691 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-br 3938 df-opab 3998 df-xp 4553 df-res 4559 df-iota 5096 df-fv 5139 |
This theorem is referenced by: fvresd 5454 funssfv 5455 feqresmpt 5483 fvreseq 5532 respreima 5556 ffvresb 5591 fnressn 5614 fressnfv 5615 fvresi 5621 fvunsng 5622 fvsnun1 5625 fvsnun2 5626 fsnunfv 5629 funfvima 5657 isoresbr 5718 isores3 5724 isoini2 5728 ovres 5918 ofres 6004 offres 6041 fo1stresm 6067 fo2ndresm 6068 fo2ndf 6132 f1o2ndf1 6133 smores 6197 smores2 6199 tfrlem1 6213 rdgival 6287 frec0g 6302 freccllem 6307 frecsuclem 6311 frecrdg 6313 resixp 6635 djulclr 6942 djurclr 6943 djur 6962 updjudhcoinlf 6973 updjudhcoinrg 6974 updjud 6975 finomni 7020 exmidfodomrlemrALT 7076 addpiord 7148 mulpiord 7149 suplocexprlemell 7545 fseq1p1m1 9905 seq3feq2 10274 seq3coll 10617 shftidt 10637 climres 11104 fisumss 11193 isumclim3 11224 fsum2dlemstep 11235 reeff1 11443 eucalgcvga 11775 eucalg 11776 strslfv2d 12040 setsslid 12048 setsslnid 12049 cnptopresti 12446 cnptoprest 12447 lmres 12456 tx1cn 12477 tx2cn 12478 cnmpt1st 12496 cnmpt2nd 12497 remetdval 12747 rescncf 12776 limcdifap 12839 limcresi 12843 reeff1o 12902 reefiso 12906 ioocosf1o 12983 relogcl 12991 relogef 12993 logltb 13003 djucllem 13178 012of 13363 2o01f 13364 |
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