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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 6528 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
| 2 | fvco2 6937 | . 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 5631 ∘ ccom 5635 Fun wfun 6492 Fn wfn 6493 ‘cfv 6498 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-fv 6506 |
| This theorem is referenced by: fin23lem30 10264 hashkf 14294 hashgval 14295 gsumpropd2lem 18647 ofco2 22416 opfv 32717 xppreima 32718 psgnfzto1stlem 33161 cycpmfv1 33174 cycpmfv2 33175 cyc3co2 33201 smatlem 33941 mdetpmtr1 33967 madjusmdetlem2 33972 madjusmdetlem4 33974 eulerpartlemgvv 34520 eulerpartlemgu 34521 sseqfv2 34538 reprpmtf1o 34770 hgt750lemg 34798 aks5lem2 42626 comptiunov2i 44133 choicefi 45629 fvcod 45656 evthiccabs 45926 cncficcgt0 46316 dvsinax 46341 fvvolioof 46417 fvvolicof 46419 stirlinglem14 46515 fourierdlem42 46577 hoicvr 46976 hoi2toco 47035 ovolval3 47075 ovolval4lem1 47077 ovnovollem1 47084 ovnovollem2 47085 |
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