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| Mirrors > Home > MPE Home > Th. List > fnfvof | Structured version Visualization version GIF version | ||
| Description: Function value of a pointwise composition. (Contributed by Stefan O'Rear, 5-Oct-2014.) (Proof shortened by Mario Carneiro, 5-Jun-2015.) |
| Ref | Expression |
|---|---|
| fnfvof | ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ (𝐴 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴)) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpll 767 | . . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐹 Fn 𝐴) | |
| 2 | simplr 769 | . . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐺 Fn 𝐴) | |
| 3 | simpr 484 | . . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉) | |
| 4 | inidm 4167 | . . 3 ⊢ (𝐴 ∩ 𝐴) = 𝐴 | |
| 5 | eqidd 2737 | . . 3 ⊢ ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → (𝐹‘𝑋) = (𝐹‘𝑋)) | |
| 6 | eqidd 2737 | . . 3 ⊢ ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → (𝐺‘𝑋) = (𝐺‘𝑋)) | |
| 7 | 1, 2, 3, 3, 4, 5, 6 | ofval 7642 | . 2 ⊢ ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋))) |
| 8 | 7 | anasss 466 | 1 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ (𝐴 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴)) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 Fn wfn 6493 ‘cfv 6498 (class class class)co 7367 ∘f cof 7629 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-of 7631 |
| This theorem is referenced by: suppofssd 8153 ofccat 14931 ghmplusg 19821 lcomfsupp 20897 lmhmplusg 21039 frlmvplusgvalc 21747 frlmvscaval 21748 frlmsslsp 21776 frlmup1 21778 frlmup2 21779 islindf4 21818 evlslem3 22058 evlslem1 22060 evladdval 22081 evlmulval 22082 coe1addfv 22230 evl1addd 22306 evl1subd 22307 evl1muld 22308 mamudi 22368 mamudir 22369 mdetrlin 22567 nmotri 24704 mdegaddle 26039 ply1rem 26131 fta1glem2 26134 fta1blem 26136 plyexmo 26279 ulmdvlem1 26365 jensen 26952 dchrmulcl 27212 dchrinv 27224 sumdchr2 27233 dchr2sum 27236 mplvrpmmhm 33690 mplvrpmrhm 33691 esplyind 33719 evlsaddval 43004 evlsmulval 43005 mzpsubst 43180 mzpcong 43400 rngunsnply 43597 ofoafg 43782 ofoafo 43784 ofoaid1 43786 ofoaid2 43787 ofoaass 43788 ofoacom 43789 naddcnff 43790 naddcnffo 43792 naddcnfcom 43794 naddcnfid1 43795 naddcnfass 43797 nthrucw 47316 cjnpoly 47337 lincsum 48905 |
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