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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 5482 | . 2 ⊢ (𝐺:𝐴⟶𝐵 → 𝐺 Fn 𝐴) | |
| 2 | fvco2 5715 | . 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 1397 ∈ wcel 2202 ∘ ccom 4729 Fn wfn 5321 ⟶wf 5322 ‘cfv 5326 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-sbc 3032 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-fv 5334 |
| This theorem is referenced by: fvco4 5718 foco2 5893 f1ocnvfv1 5917 f1ocnvfv2 5918 fcof1 5923 fcofo 5924 cocan1 5927 cocan2 5928 isotr 5956 algrflem 6393 algrflemg 6394 difinfsn 7298 ctssdccl 7309 cc3 7486 0tonninf 10701 1tonninf 10702 seqf1oglem2 10781 seqf1og 10782 summodclem3 11940 fsumf1o 11950 fsumcl2lem 11958 fsumadd 11966 fsummulc2 12008 prodmodclem3 12135 fprodf1o 12148 fprodmul 12151 algcvg 12619 eulerthlemth 12803 ennnfonelemnn0 13042 ctinfomlemom 13047 mhmco 13572 gsumfzreidx 13923 gsumfzmhm 13929 mplsubgfileminv 14713 cnptopco 14945 lmtopcnp 14973 upxp 14995 uptx 14997 cnmpt11 15006 cnmpt21 15014 comet 15222 cnmetdval 15252 climcncf 15307 cncfco 15314 limccnpcntop 15398 dvcoapbr 15430 dvcjbr 15431 dvfre 15433 plycjlemc 15483 plycj 15484 isomninnlem 16634 iswomninnlem 16653 ismkvnnlem 16656 gfsumval 16680 gsumgfsumlem 16683 |
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