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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 5489 | . 2 ⊢ (𝐺:𝐴⟶𝐵 → 𝐺 Fn 𝐴) | |
| 2 | fvco2 5724 | . 2 ⊢ ((𝐺 Fn 𝐴 ∧ 𝐶 ∈ 𝐴) → ((𝐹 ∘ 𝐺)‘𝐶) = (𝐹‘(𝐺‘𝐶))) | |
| 3 | 1, 2 | sylan 283 | 1 ⊢ ((𝐺:𝐴⟶𝐵 ∧ 𝐶 ∈ 𝐴) → ((𝐹 ∘ 𝐺)‘𝐶) = (𝐹‘(𝐺‘𝐶))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2202 ∘ ccom 4735 Fn wfn 5328 ⟶wf 5329 ‘cfv 5333 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-sbc 3033 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-fv 5341 |
| This theorem is referenced by: fvco4 5727 foco2 5904 f1ocnvfv1 5928 f1ocnvfv2 5929 fcof1 5934 fcofo 5935 cocan1 5938 cocan2 5939 isotr 5967 algrflem 6403 algrflemg 6404 difinfsn 7342 ctssdccl 7353 cc3 7530 0tonninf 10748 1tonninf 10749 seqf1oglem2 10828 seqf1og 10829 summodclem3 12004 fsumf1o 12014 fsumcl2lem 12022 fsumadd 12030 fsummulc2 12072 prodmodclem3 12199 fprodf1o 12212 fprodmul 12215 algcvg 12683 eulerthlemth 12867 ennnfonelemnn0 13106 ctinfomlemom 13111 mhmco 13636 gsumfzreidx 13987 gsumfzmhm 13993 mplsubgfileminv 14784 cnptopco 15016 lmtopcnp 15044 upxp 15066 uptx 15068 cnmpt11 15077 cnmpt21 15085 comet 15293 cnmetdval 15323 climcncf 15378 cncfco 15385 limccnpcntop 15469 dvcoapbr 15501 dvcjbr 15502 dvfre 15504 plycjlemc 15554 plycj 15555 isomninnlem 16745 iswomninnlem 16765 ismkvnnlem 16768 gfsumval 16792 gsumgfsumlem 16795 gfsump1 16798 |
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