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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 6511 | . 2 ⊢ (Fun 𝐺 ↔ 𝐺 Fn dom 𝐺) | |
| 2 | fvco2 6919 | . 2 ⊢ ((𝐺 Fn dom 𝐺 ∧ 𝐴 ∈ dom 𝐺) → ((𝐹 ∘ 𝐺)‘𝐴) = (𝐹‘(𝐺‘𝐴))) | |
| 3 | 1, 2 | sylanb 581 | 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 1541 ∈ wcel 2111 dom cdm 5614 ∘ ccom 5618 Fun wfun 6475 Fn wfn 6476 ‘cfv 6481 |
| 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 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-br 5090 df-opab 5152 df-id 5509 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-iota 6437 df-fun 6483 df-fn 6484 df-fv 6489 |
| This theorem is referenced by: fin23lem30 10233 hashkf 14239 hashgval 14240 gsumpropd2lem 18587 ofco2 22366 opfv 32626 xppreima 32627 psgnfzto1stlem 33069 cycpmfv1 33082 cycpmfv2 33083 cyc3co2 33109 smatlem 33810 mdetpmtr1 33836 madjusmdetlem2 33841 madjusmdetlem4 33843 eulerpartlemgvv 34389 eulerpartlemgu 34390 sseqfv2 34407 reprpmtf1o 34639 hgt750lemg 34667 aks5lem2 42228 comptiunov2i 43747 choicefi 45245 fvcod 45272 evthiccabs 45544 cncficcgt0 45934 dvsinax 45959 fvvolioof 46035 fvvolicof 46037 stirlinglem14 46133 fourierdlem42 46195 hoicvr 46594 hoi2toco 46653 ovolval3 46693 ovolval4lem1 46695 ovnovollem1 46702 ovnovollem2 46703 |
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