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Theorem csbfv 6933
Description: Substitution for a function value. (Contributed by NM, 1-Jan-2006.) (Revised by NM, 20-Aug-2018.)
Assertion
Ref Expression
csbfv ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)
Distinct variable group:   𝑥,𝐹
Allowed substitution hint:   𝐴(𝑥)

Proof of Theorem csbfv
StepHypRef Expression
1 csbfv2g 6932 . . 3 (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘⦋𝐴 / 𝑥⦌𝑥))
2 csbvarg 4391 . . . 4 (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌𝑥 = 𝐴)
32fveq2d 6890 . . 3 (𝐴 ∈ V → (𝐹‘⦋𝐴 / 𝑥⦌𝑥) = (𝐹‘𝐴))
41, 3eqtrd 2795 . 2 (𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴))
5 csbprc 4366 . . 3 (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = ∅)
6 fvprc 6878 . . 3 (¬ 𝐴 ∈ V → (𝐹‘𝐴) = ∅)
75, 6eqtr4d 2798 . 2 (¬ 𝐴 ∈ V → ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴))
84, 7pm2.61i 184 1 ⦋𝐴 / 𝑥⦌(𝐹‘𝑥) = (𝐹‘𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   = wceq 1569   ∈ wcel 2144  Vcvv 3450  ⦋csb 3846  ∅c0 4278  ‘cfv 6539
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-nul 5259  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-ss 3896  df-dif 4047  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-dm 5660  df-iota 6494  df-fv 6547
This theorem is used by:  mptcoe1fsupp  22539  mptcoe1matfsupp  23126  mp2pm2mplem4  23133  chfacfscmulfsupp  23183  chfacfpmmulfsupp  23187  cpmidpmatlem3  23196  cayhamlem4  23212  cayleyhamilton1  23216  logbmpt  27122  nbgrcl  29922  nbgrnvtx0  29926  iuninc  33203  disjxpin  33230  finixpnum  38622  cdlemkid3N  42084  cdlemkid4  42085  cdlemk39s  42090  mccllem  46703  clnbgrcl  49013  clnbgrnvtx0  49019  veroquadmodzerod  51153
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