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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 6380 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
2 | fvco2 6753 | . 2 ⊢ ((𝐺 Fn dom 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) | |
3 | 1, 2 | sylanb 583 | 1 ⊢ ((Fun 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 dom cdm 5550 ∘ ccom 5554 Fun wfun 6344 Fn wfn 6345 ‘cfv 6350 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-id 5455 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-iota 6309 df-fun 6352 df-fn 6353 df-fv 6358 |
This theorem is referenced by: fin23lem30 9758 hashkf 13686 hashgval 13687 gsumpropd2lem 17883 ofco2 21054 opfv 30387 xppreima 30388 psgnfzto1stlem 30737 cycpmfv1 30750 cycpmfv2 30751 cyc3co2 30777 smatlem 31057 mdetpmtr1 31083 madjusmdetlem2 31088 madjusmdetlem4 31090 eulerpartlemgvv 31629 eulerpartlemgu 31630 sseqfv2 31647 reprpmtf1o 31892 hgt750lemg 31920 comptiunov2i 40044 choicefi 41455 fvcod 41484 evthiccabs 41763 cncficcgt0 42163 dvsinax 42189 fvvolioof 42267 fvvolicof 42269 stirlinglem14 42365 fourierdlem42 42427 hoicvr 42823 hoi2toco 42882 ovolval3 42922 ovolval4lem1 42924 ovnovollem1 42931 ovnovollem2 42932 |
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