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Theorem fvmpt 5590
Description: Value of a function given in maps-to notation. (Contributed by NM, 17-Aug-2011.)
Hypotheses
Ref Expression
fvmptg.1 (𝑥 = 𝐴𝐵 = 𝐶)
fvmptg.2 𝐹 = (𝑥𝐷𝐵)
fvmpt.3 𝐶 ∈ V
Assertion
Ref Expression
fvmpt (𝐴𝐷 → (𝐹𝐴) = 𝐶)
Distinct variable groups:   𝑥,𝐴   𝑥,𝐶   𝑥,𝐷
Allowed substitution hints:   𝐵(𝑥)   𝐹(𝑥)

Proof of Theorem fvmpt
StepHypRef Expression
1 fvmpt.3 . 2 𝐶 ∈ V
2 fvmptg.1 . . 3 (𝑥 = 𝐴𝐵 = 𝐶)
3 fvmptg.2 . . 3 𝐹 = (𝑥𝐷𝐵)
42, 3fvmptg 5589 . 2 ((𝐴𝐷𝐶 ∈ V) → (𝐹𝐴) = 𝐶)
51, 4mpan2 425 1 (𝐴𝐷 → (𝐹𝐴) = 𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1353  wcel 2148  Vcvv 2737  cmpt 4062  cfv 5213
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4119  ax-pow 4172  ax-pr 4207
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2739  df-sbc 2963  df-un 3133  df-in 3135  df-ss 3142  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3809  df-br 4002  df-opab 4063  df-mpt 4064  df-id 4291  df-xp 4630  df-rel 4631  df-cnv 4632  df-co 4633  df-dm 4634  df-iota 5175  df-fun 5215  df-fv 5221
This theorem is referenced by:  reldm  6182  rdg0  6383  oacl  6456  fvmptmap  6680  xpcomco  6821  infnninf  7117  uzval  9524  sqrtrval  11000  fsumcnv  11436  fprodcnv  11624  ege2le3  11670  qnumval  12175  qdenval  12176  odzval  12231  pcmpt  12331  1arithlem1  12351  peano4nninf  14526  peano3nninf  14527  nninfsellemeq  14534
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