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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 766 | . . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐹 Fn 𝐴) | |
| 2 | simplr 768 | . . 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 4179 | . . 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 7633 | . 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 1541 ∈ wcel 2113 Fn wfn 6487 ‘cfv 6492 (class class class)co 7358 ∘f cof 7620 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 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 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7361 df-oprab 7362 df-mpo 7363 df-of 7622 |
| This theorem is referenced by: suppofssd 8145 ofccat 14892 ghmplusg 19775 lcomfsupp 20853 lmhmplusg 20996 frlmvplusgvalc 21722 frlmvscaval 21723 frlmsslsp 21751 frlmup1 21753 frlmup2 21754 islindf4 21793 evlslem3 22035 evlslem1 22037 evladdval 22058 evlmulval 22059 coe1addfv 22207 evl1addd 22285 evl1subd 22286 evl1muld 22287 mamudi 22347 mamudir 22348 mdetrlin 22546 nmotri 24683 mdegaddle 26035 ply1rem 26127 fta1glem2 26130 fta1blem 26132 plyexmo 26277 ulmdvlem1 26365 jensen 26955 dchrmulcl 27216 dchrinv 27228 sumdchr2 27237 dchr2sum 27240 mplvrpmmhm 33711 mplvrpmrhm 33712 esplyind 33731 evlsaddval 42810 evlsmulval 42811 mzpsubst 42986 mzpcong 43210 rngunsnply 43407 ofoafg 43592 ofoafo 43594 ofoaid1 43596 ofoaid2 43597 ofoaass 43598 ofoacom 43599 naddcnff 43600 naddcnffo 43602 naddcnfcom 43604 naddcnfid1 43605 naddcnfass 43607 nthrucw 47126 cjnpoly 47131 lincsum 48671 |
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