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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 6546 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
| 2 | fvco2 6959 | . 2 ⊢ ((𝐺 Fn dom 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) | |
| 3 | 1, 2 | sylanb 590 | 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 1559 ∈ wcel 2141 dom cdm 5643 ∘ ccom 5647 Fun wfun 6510 Fn wfn 6511 ‘cfv 6516 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6472 df-fun 6518 df-fn 6519 df-fv 6524 |
| This theorem is referenced by: fvcod 6961 fin23lem30 10293 hashkf 14339 hashgval 14340 gsumpropd2lem 18704 ofco2 22499 opfv 32807 xppreima 32808 psgnfzto1stlem 33241 cycpmfv1 33254 cycpmfv2 33255 cyc3co2 33281 smatlem 34055 mdetpmtr1 34081 madjusmdetlem2 34086 madjusmdetlem4 34088 eulerpartlemgvv 34634 eulerpartlemgu 34635 sseqfv2 34652 reprpmtf1o 34881 hgt750lemg 34909 aks5lem2 42765 comptiunov2i 44243 choicefi 45738 evthiccabs 46033 cncficcgt0 46423 dvsinax 46448 fvvolioof 46524 fvvolicof 46526 stirlinglem14 46622 fourierdlem42 46684 hoicvr 47083 hoi2toco 47142 ovolval3 47182 ovolval4lem1 47184 ovnovollem1 47191 ovnovollem2 47192 |
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