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Mirrors > Home > MPE Home > Th. List > fvco | Structured version Visualization version GIF version |
Description: Value of a function composition. Similar to Exercise 5 of [TakeutiZaring] p. 28. (Contributed by NM, 22-Apr-2006.) (Proof shortened by Mario Carneiro, 26-Dec-2014.) |
Ref | Expression |
---|---|
fvco | ⊢ ((Fun 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | funfn 6354 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
2 | fvco2 6735 | . 2 ⊢ ((𝐺 Fn dom 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) | |
3 | 1, 2 | sylanb 584 | 1 ⊢ ((Fun 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 ∈ wcel 2111 dom cdm 5519 ∘ ccom 5523 Fun wfun 6318 Fn wfn 6319 ‘cfv 6324 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-fv 6332 |
This theorem is referenced by: fin23lem30 9753 hashkf 13688 hashgval 13689 gsumpropd2lem 17881 ofco2 21056 opfv 30407 xppreima 30408 psgnfzto1stlem 30792 cycpmfv1 30805 cycpmfv2 30806 cyc3co2 30832 smatlem 31150 mdetpmtr1 31176 madjusmdetlem2 31181 madjusmdetlem4 31183 eulerpartlemgvv 31744 eulerpartlemgu 31745 sseqfv2 31762 reprpmtf1o 32007 hgt750lemg 32035 comptiunov2i 40407 choicefi 41829 fvcod 41858 evthiccabs 42133 cncficcgt0 42530 dvsinax 42555 fvvolioof 42631 fvvolicof 42633 stirlinglem14 42729 fourierdlem42 42791 hoicvr 43187 hoi2toco 43246 ovolval3 43286 ovolval4lem1 43288 ovnovollem1 43295 ovnovollem2 43296 |
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