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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 5479 | . 2 ⊢ (𝐺:𝐴⟶𝐵 → 𝐺 Fn 𝐴) | |
| 2 | fvco2 5711 | . 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 1395 ∈ wcel 2200 ∘ ccom 4727 Fn wfn 5319 ⟶wf 5320 ‘cfv 5324 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-sbc 3030 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fn 5327 df-f 5328 df-fv 5332 |
| This theorem is referenced by: fvco4 5714 foco2 5889 f1ocnvfv1 5913 f1ocnvfv2 5914 fcof1 5919 fcofo 5920 cocan1 5923 cocan2 5924 isotr 5952 algrflem 6389 algrflemg 6390 difinfsn 7290 ctssdccl 7301 cc3 7477 0tonninf 10692 1tonninf 10693 seqf1oglem2 10772 seqf1og 10773 summodclem3 11931 fsumf1o 11941 fsumcl2lem 11949 fsumadd 11957 fsummulc2 11999 prodmodclem3 12126 fprodf1o 12139 fprodmul 12142 algcvg 12610 eulerthlemth 12794 ennnfonelemnn0 13033 ctinfomlemom 13038 mhmco 13563 gsumfzreidx 13914 gsumfzmhm 13920 mplsubgfileminv 14704 cnptopco 14936 lmtopcnp 14964 upxp 14986 uptx 14988 cnmpt11 14997 cnmpt21 15005 comet 15213 cnmetdval 15243 climcncf 15298 cncfco 15305 limccnpcntop 15389 dvcoapbr 15421 dvcjbr 15422 dvfre 15424 plycjlemc 15474 plycj 15475 isomninnlem 16570 iswomninnlem 16589 ismkvnnlem 16592 |
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