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Mirrors > Home > ILE Home > Th. List > fvco3 | GIF version |
Description: Value of a function composition. (Contributed by NM, 3-Jan-2004.) (Revised by Mario Carneiro, 26-Dec-2014.) |
Ref | Expression |
---|---|
fvco3 | ⊢ ((𝐺:𝐴⟶𝐵 ∧ 𝐶 ∈ 𝐴) → ((𝐹 ∘ 𝐺)‘𝐶) = (𝐹‘(𝐺‘𝐶))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ffn 5280 | . 2 ⊢ (𝐺:𝐴⟶𝐵 → 𝐺 Fn 𝐴) | |
2 | fvco2 5498 | . 2 ⊢ ((𝐺 Fn 𝐴 ∧ 𝐶 ∈ 𝐴) → ((𝐹 ∘ 𝐺)‘𝐶) = (𝐹‘(𝐺‘𝐶))) | |
3 | 1, 2 | sylan 281 | 1 ⊢ ((𝐺:𝐴⟶𝐵 ∧ 𝐶 ∈ 𝐴) → ((𝐹 ∘ 𝐺)‘𝐶) = (𝐹‘(𝐺‘𝐶))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1332 ∈ wcel 1481 ∘ ccom 4551 Fn wfn 5126 ⟶wf 5127 ‘cfv 5131 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-rex 2423 df-v 2691 df-sbc 2914 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-br 3938 df-opab 3998 df-id 4223 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-rn 4558 df-res 4559 df-ima 4560 df-iota 5096 df-fun 5133 df-fn 5134 df-f 5135 df-fv 5139 |
This theorem is referenced by: fvco4 5501 foco2 5663 f1ocnvfv1 5686 f1ocnvfv2 5687 fcof1 5692 fcofo 5693 cocan1 5696 cocan2 5697 isotr 5725 algrflem 6134 algrflemg 6135 difinfsn 6993 ctssdccl 7004 cc3 7100 0tonninf 10243 1tonninf 10244 summodclem3 11181 fsumf1o 11191 fsumcl2lem 11199 fsumadd 11207 fsummulc2 11249 prodmodclem3 11376 algcvg 11765 ennnfonelemnn0 11971 ctinfomlemom 11976 cnptopco 12430 lmtopcnp 12458 upxp 12480 uptx 12482 cnmpt11 12491 cnmpt21 12499 comet 12707 cnmetdval 12737 climcncf 12779 cncfco 12786 limccnpcntop 12852 dvcoapbr 12879 dvcjbr 12880 dvfre 12882 isomninnlem 13400 iswomninnlem 13417 ismkvnnlem 13419 |
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