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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 6385 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
2 | fvco2 6758 | . 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 1537 ∈ wcel 2114 dom cdm 5555 ∘ ccom 5559 Fun wfun 6349 Fn wfn 6350 ‘cfv 6355 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 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 3496 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-fv 6363 |
This theorem is referenced by: fin23lem30 9764 hashkf 13693 hashgval 13694 gsumpropd2lem 17889 ofco2 21060 opfv 30393 xppreima 30394 psgnfzto1stlem 30742 cycpmfv1 30755 cycpmfv2 30756 cyc3co2 30782 smatlem 31062 mdetpmtr1 31088 madjusmdetlem2 31093 madjusmdetlem4 31095 eulerpartlemgvv 31634 eulerpartlemgu 31635 sseqfv2 31652 reprpmtf1o 31897 hgt750lemg 31925 comptiunov2i 40100 choicefi 41512 fvcod 41541 evthiccabs 41820 cncficcgt0 42220 dvsinax 42246 fvvolioof 42323 fvvolicof 42325 stirlinglem14 42421 fourierdlem42 42483 hoicvr 42879 hoi2toco 42938 ovolval3 42978 ovolval4lem1 42980 ovnovollem1 42987 ovnovollem2 42988 |
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