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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 5473 | . 2 ⊢ (𝐺:𝐴⟶𝐵 → 𝐺 Fn 𝐴) | |
| 2 | fvco2 5705 | . 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 4723 Fn wfn 5313 ⟶wf 5314 ‘cfv 5318 |
| 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 4202 ax-pow 4258 ax-pr 4293 |
| 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 2801 df-sbc 3029 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-fv 5326 |
| This theorem is referenced by: fvco4 5708 foco2 5883 f1ocnvfv1 5907 f1ocnvfv2 5908 fcof1 5913 fcofo 5914 cocan1 5917 cocan2 5918 isotr 5946 algrflem 6381 algrflemg 6382 difinfsn 7278 ctssdccl 7289 cc3 7465 0tonninf 10674 1tonninf 10675 seqf1oglem2 10754 seqf1og 10755 summodclem3 11906 fsumf1o 11916 fsumcl2lem 11924 fsumadd 11932 fsummulc2 11974 prodmodclem3 12101 fprodf1o 12114 fprodmul 12117 algcvg 12585 eulerthlemth 12769 ennnfonelemnn0 13008 ctinfomlemom 13013 mhmco 13538 gsumfzreidx 13889 gsumfzmhm 13895 mplsubgfileminv 14679 cnptopco 14911 lmtopcnp 14939 upxp 14961 uptx 14963 cnmpt11 14972 cnmpt21 14980 comet 15188 cnmetdval 15218 climcncf 15273 cncfco 15280 limccnpcntop 15364 dvcoapbr 15396 dvcjbr 15397 dvfre 15399 plycjlemc 15449 plycj 15450 isomninnlem 16458 iswomninnlem 16477 ismkvnnlem 16480 |
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