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Theorem mpteq2dv 4019
Description: An equality inference for the maps-to notation. (Contributed by Mario Carneiro, 23-Aug-2014.)
Hypothesis
Ref Expression
mpteq2dv.1 (𝜑𝐵 = 𝐶)
Assertion
Ref Expression
mpteq2dv (𝜑 → (𝑥𝐴𝐵) = (𝑥𝐴𝐶))
Distinct variable group:   𝜑,𝑥
Allowed substitution hints:   𝐴(𝑥)   𝐵(𝑥)   𝐶(𝑥)

Proof of Theorem mpteq2dv
StepHypRef Expression
1 mpteq2dv.1 . . 3 (𝜑𝐵 = 𝐶)
21adantr 274 . 2 ((𝜑𝑥𝐴) → 𝐵 = 𝐶)
32mpteq2dva 4018 1 (𝜑 → (𝑥𝐴𝐵) = (𝑥𝐴𝐶))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1331  wcel 1480  cmpt 3989
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-11 1484  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121
This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-ral 2421  df-opab 3990  df-mpt 3991
This theorem is referenced by:  ofeq  5984  rdgeq1  6268  rdgeq2  6269  omv  6351  oeiv  6352  0tonninf  10212  1tonninf  10213  iseqf1olemjpcl  10268  iseqf1olemqpcl  10269  iseqf1olemfvp  10270  seq3f1olemqsum  10273  seq3f1olemp  10275  summodc  11152  zsumdc  11153  fsum3  11156  prodeq2w  11325  prodmodc  11347  sloteq  11964  cnprcl2k  12375  fsumcncntop  12725  expcncf  12761  dvexp  12844  dvexp2  12845  peano4nninf  13200  peano3nninf  13201  nninfalllem1  13203  nninfsellemdc  13206  nninfsellemeq  13210  nninfsellemqall  13211  nninfsellemeqinf  13212  nninfomni  13215
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