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Theorem mptfvmpt 7086
Description: A function in maps-to notation as the value of another function in maps-to notation. (Contributed by AV, 20-Aug-2022.)
Hypotheses
Ref Expression
mptfvmpt.y (𝑦 = 𝑌𝑀 = (𝑥𝑉𝐴))
mptfvmpt.g 𝐺 = (𝑦𝑊𝑀)
mptfvmpt.v 𝑉 = (𝐹𝑋)
Assertion
Ref Expression
mptfvmpt (𝑌𝑊 → (𝐺𝑌) = (𝑥𝑉𝐴))
Distinct variable groups:   𝑦,𝐴   𝑥,𝑉,𝑦   𝑦,𝑊   𝑦,𝑌
Allowed substitution hints:   𝐴(𝑥)   𝐹(𝑥,𝑦)   𝐺(𝑥,𝑦)   𝑀(𝑥,𝑦)   𝑊(𝑥)   𝑋(𝑥,𝑦)   𝑌(𝑥)

Proof of Theorem mptfvmpt
StepHypRef Expression
1 mptfvmpt.y . 2 (𝑦 = 𝑌𝑀 = (𝑥𝑉𝐴))
2 mptfvmpt.g . 2 𝐺 = (𝑦𝑊𝑀)
3 mptfvmpt.v . . . 4 𝑉 = (𝐹𝑋)
43fvexi 6770 . . 3 𝑉 ∈ V
54mptex 7081 . 2 (𝑥𝑉𝐴) ∈ V
61, 2, 5fvmpt 6857 1 (𝑌𝑊 → (𝐺𝑌) = (𝑥𝑉𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1539  wcel 2108  cmpt 5153  cfv 6418
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-rep 5205  ax-sep 5218  ax-nul 5225  ax-pr 5347
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-reu 3070  df-rab 3072  df-v 3424  df-sbc 3712  df-csb 3829  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-iun 4923  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-iota 6376  df-fun 6420  df-fn 6421  df-f 6422  df-f1 6423  df-fo 6424  df-f1o 6425  df-fv 6426
This theorem is referenced by:  cidfval  17302  idafval  17688  grpinvfvalALT  18534  grplactfval  18591  odfvalALT  19056  asclfval  20993  ig1pval  25242  ishlg  26867  htthlem  29180  sgnsv  31329  mvrsval  33367  mvhfval  33395  msrfval  33399  lkrfval  37028  pmapfval  37697  watfvalN  37933  ldilfset  38049  ltrnfset  38058  dilfsetN  38093  trnfsetN  38096  trlfset  38101  tgrpfset  38685  tendofset  38699  tendoi  38735  erngfset  38740  erngfset-rN  38748  dvafset  38945  diaffval  38971  dvhfset  39021  docaffvalN  39062  djaffvalN  39074  dibffval  39081  dicffval  39115  dihffval  39171  dihfval  39172  dochffval  39290  djhffval  39337  lcfrlem8  39490  lcdfval  39529  mapdffval  39567  mapdfval  39568  hvmapffval  39699  hdmap1ffval  39736  hdmapffval  39767  hdmapfval  39768  hgmapffval  39826  hgmapfval  39827  hbtlem1  40864  hbtlem7  40866
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