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Theorem fvmpt 5723
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 5722 . 2 ((𝐴𝐷𝐶 ∈ V) → (𝐹𝐴) = 𝐶)
51, 4mpan2 425 1 (𝐴𝐷 → (𝐹𝐴) = 𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1397  wcel 2202  Vcvv 2802  cmpt 4150  cfv 5326
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334
This theorem is referenced by:  reldm  6349  rdg0  6553  oacl  6628  fvmptmap  6854  xpcomco  7010  infnninf  7323  uzval  9757  sqrtrval  11562  fsumcnv  12000  fprodcnv  12188  ege2le3  12234  bitsfval  12505  nninfctlemfo  12613  qnumval  12759  qdenval  12760  odzval  12816  pcmpt  12918  1arithlem1  12938  elply2  15462  peano4nninf  16629  peano3nninf  16630  nninfsellemeq  16637
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