| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 6530 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
| 2 | fvco2 6939 | . 2 ⊢ ((𝐺 Fn dom 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) | |
| 3 | 1, 2 | sylanb 582 | 1 ⊢ ((Fun 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 dom cdm 5632 ∘ ccom 5636 Fun wfun 6494 Fn wfn 6495 ‘cfv 6500 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-fv 6508 |
| This theorem is referenced by: fin23lem30 10264 hashkf 14267 hashgval 14268 gsumpropd2lem 18616 ofco2 22407 opfv 32734 xppreima 32735 psgnfzto1stlem 33194 cycpmfv1 33207 cycpmfv2 33208 cyc3co2 33234 smatlem 33975 mdetpmtr1 34001 madjusmdetlem2 34006 madjusmdetlem4 34008 eulerpartlemgvv 34554 eulerpartlemgu 34555 sseqfv2 34572 reprpmtf1o 34804 hgt750lemg 34832 aks5lem2 42557 comptiunov2i 44062 choicefi 45558 fvcod 45585 evthiccabs 45856 cncficcgt0 46246 dvsinax 46271 fvvolioof 46347 fvvolicof 46349 stirlinglem14 46445 fourierdlem42 46507 hoicvr 46906 hoi2toco 46965 ovolval3 47005 ovolval4lem1 47007 ovnovollem1 47014 ovnovollem2 47015 |
| Copyright terms: Public domain | W3C validator |