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Theorem fnfvof 7699
Description: Function value of a pointwise composition. (Contributed by Stefan O'Rear, 5-Oct-2014.) (Proof shortened by Mario Carneiro, 5-Jun-2015.)
Assertion
Ref Expression
fnfvof (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ (𝐴 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴)) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋)))

Proof of Theorem fnfvof
StepHypRef Expression
1 simpll 779 . . 3 (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐹 Fn 𝐴)
2 simplr 781 . . 3 (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐺 Fn 𝐴)
3 simpr 490 . . 3 (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉)
4 inidm 4172 . . 3 (𝐴 ∩ 𝐴) = 𝐴
5 eqidd 2762 . . 3 ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → (𝐹‘𝑋) = (𝐹‘𝑋))
6 eqidd 2762 . . 3 ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → (𝐺‘𝑋) = (𝐺‘𝑋))
71, 2, 3, 3, 4, 5, 6ofval 7693 . 2 ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋)))
87anasss 472 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
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2145   Fn wfn 6526  ‘cfv 6531  (class class class)co 7412   ∘f cof 7680
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-rep 5232  ax-sep 5249  ax-nul 5260  ax-pr 5391
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3078  df-rex 3088  df-reu 3367  df-rab 3414  df-v 3453  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-iota 6487  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-ov 7415  df-oprab 7416  df-mpo 7417  df-of 7682
This theorem is used by:  suppofssd  8204  ofccat  15102  ghmplusg  20040  lcomfsupp  21157  lmhmplusg  21299  frlmvplusgvalc  22053  frlmvscaval  22054  frlmsslsp  22082  frlmup1  22084  frlmup2  22085  islindf4  22124  evlslem3  22369  evlslem1  22371  evladdval  22392  evlmulval  22393  evlsaddval  22418  evlsmulval  22419  coe1addfv  22564  evl1addd  22639  evl1subd  22640  evl1muld  22641  mamudi  22698  mamudir  22699  mdetrlin  22897  nmotri  25038  mdegaddle  26372  ply1rem  26464  fta1glem2  26467  fta1blem  26469  plyexmo  26618  ulmdvlem1  26709  jensen  27298  dchrmulcl  27558  dchrinv  27570  sumdchr2  27579  dchr2sum  27582  selvply1rhmlem4  34137  mplvrpmmhm  34160  mplvrpmrhm  34161  esplyind  34189  mzpsubst  43712  mzpcong  43932  rngunsnply  44129  ofoafg  44314  ofoafo  44316  ofoaid1  44318  ofoaid2  44319  ofoaass  44320  ofoacom  44321  naddcnff  44322  naddcnffo  44324  naddcnfcom  44326  naddcnfid1  44327  naddcnfass  44329  sqrtnnaa  47857  sqrtnzqaa  47858  cjnpoly  47883  lincsum  49485
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