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Theorem mpteq2dv 4073
Description: An equality inference for the maps-to notation. (Contributed by Mario Carneiro, 23-Aug-2014.)
Hypothesis
Ref Expression
mpteq2dv.1  |-  ( ph  ->  B  =  C )
Assertion
Ref Expression
mpteq2dv  |-  ( ph  ->  ( x  e.  A  |->  B )  =  ( x  e.  A  |->  C ) )
Distinct variable group:    ph, x
Allowed substitution hints:    A( x)    B( x)    C( x)

Proof of Theorem mpteq2dv
StepHypRef Expression
1 mpteq2dv.1 . . 3  |-  ( ph  ->  B  =  C )
21adantr 274 . 2  |-  ( (
ph  /\  x  e.  A )  ->  B  =  C )
32mpteq2dva 4072 1  |-  ( ph  ->  ( x  e.  A  |->  B )  =  ( x  e.  A  |->  C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1343    e. wcel 2136    |-> cmpt 4043
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 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-11 1494  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-ext 2147
This theorem depends on definitions:  df-bi 116  df-tru 1346  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-ral 2449  df-opab 4044  df-mpt 4045
This theorem is referenced by:  ofeq  6052  rdgeq1  6339  rdgeq2  6340  omv  6423  oeiv  6424  0tonninf  10374  1tonninf  10375  iseqf1olemjpcl  10430  iseqf1olemqpcl  10431  iseqf1olemfvp  10432  seq3f1olemqsum  10435  seq3f1olemp  10437  summodc  11324  zsumdc  11325  fsum3  11328  prodeq2w  11497  prodmodc  11519  zproddc  11520  fprodseq  11524  1arithlem1  12293  sloteq  12399  cnprcl2k  12846  fsumcncntop  13196  expcncf  13232  dvexp  13315  dvexp2  13316  lgsval  13545  peano4nninf  13886  peano3nninf  13887  nninfalllem1  13888  nninfsellemdc  13890  nninfsellemeq  13894  nninfsellemqall  13895  nninfsellemeqinf  13896  nninfomni  13899
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