Theorem fnfvof 7686

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

Step	Hyp	Ref	Expression
1		simpll 765	. . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐹 Fn 𝐴)
2		simplr 767	. . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐺 Fn 𝐴)
3		simpr 485	. . 3 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ 𝑉)
4		inidm 4218	. . 3 ⊢ (𝐴 ∩ 𝐴) = 𝐴
5		eqidd 2733	. . 3 ⊢ ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → (𝐹‘𝑋) = (𝐹‘𝑋))
6		eqidd 2733	. . 3 ⊢ ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → (𝐺‘𝑋) = (𝐺‘𝑋))
7	1, 2, 3, 3, 4, 5, 6	ofval 7680	. 2 ⊢ ((((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ 𝐴 ∈ 𝑉) ∧ 𝑋 ∈ 𝐴) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋)))
8	7	anasss 467	1 ⊢ (((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) ∧ (𝐴 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴)) → ((𝐹 ∘f 𝑅𝐺)‘𝑋) = ((𝐹‘𝑋)𝑅(𝐺‘𝑋)))

Syntax hints:   → wi 4   ∧ wa 396   = wceq 1541   ∈ wcel 2106   Fn wfn 6538  ‘cfv 6543  (class class class)co 7408   ∘_f cof 7667

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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-rep 5285  ax-sep 5299  ax-nul 5306  ax-pr 5427

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ne 2941  df-ral 3062  df-rex 3071  df-reu 3377  df-rab 3433  df-v 3476  df-sbc 3778  df-csb 3894  df-dif 3951  df-un 3953  df-in 3955  df-ss 3965  df-nul 4323  df-if 4529  df-sn 4629  df-pr 4631  df-op 4635  df-uni 4909  df-iun 4999  df-br 5149  df-opab 5211  df-mpt 5232  df-id 5574  df-xp 5682  df-rel 5683  df-cnv 5684  df-co 5685  df-dm 5686  df-rn 5687  df-res 5688  df-ima 5689  df-iota 6495  df-fun 6545  df-fn 6546  df-f 6547  df-f1 6548  df-fo 6549  df-f1o 6550  df-fv 6551  df-ov 7411  df-oprab 7412  df-mpo 7413  df-of 7669

This theorem is referenced by:  suppofssd  8187  ofccat  14915  ghmplusg  19713  lcomfsupp  20511  lmhmplusg  20654  frlmvplusgvalc  21321  frlmvscaval  21322  frlmsslsp  21350  frlmup1  21352  frlmup2  21353  islindf4  21392  evlslem3  21642  evlslem1  21644  coe1addfv  21786  evl1addd  21859  evl1subd  21860  evl1muld  21861  mamudi  21902  mamudir  21903  mdetrlin  22103  nmotri  24255  mdegaddle  25591  ply1rem  25680  fta1glem2  25683  fta1blem  25685  plyexmo  25825  ulmdvlem1  25911  jensen  26490  dchrmulcl  26749  dchrinv  26761  sumdchr2  26770  dchr2sum  26773  evlsaddval  41142  evlsmulval  41143  evladdval  41149  evlmulval  41150  mzpsubst  41476  mzpcong  41701  rngunsnply  41905  ofoafg  42094  ofoafo  42096  ofoaid1  42098  ofoaid2  42099  ofoaass  42100  ofoacom  42101  naddcnff  42102  naddcnffo  42104  naddcnfcom  42106  naddcnfid1  42107  naddcnfass  42109  lincsum  47100