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Theorem fvmpt 5719
Description: Value of a function given in maps-to notation. (Contributed by NM, 17-Aug-2011.)
Hypotheses
Ref Expression
fvmptg.1  |-  ( x  =  A  ->  B  =  C )
fvmptg.2  |-  F  =  ( x  e.  D  |->  B )
fvmpt.3  |-  C  e. 
_V
Assertion
Ref Expression
fvmpt  |-  ( A  e.  D  ->  ( F `  A )  =  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  e. 
_V
2 fvmptg.1 . . 3  |-  ( x  =  A  ->  B  =  C )
3 fvmptg.2 . . 3  |-  F  =  ( x  e.  D  |->  B )
42, 3fvmptg 5718 . 2  |-  ( ( A  e.  D  /\  C  e.  _V )  ->  ( F `  A
)  =  C )
51, 4mpan2 425 1  |-  ( A  e.  D  ->  ( F `  A )  =  C )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1395    e. wcel 2200   _Vcvv 2800    |-> cmpt 4148   ` cfv 5324
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2802  df-sbc 3030  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-iota 5284  df-fun 5326  df-fv 5332
This theorem is referenced by:  reldm  6344  rdg0  6548  oacl  6623  fvmptmap  6849  xpcomco  7005  infnninf  7314  uzval  9747  sqrtrval  11551  fsumcnv  11988  fprodcnv  12176  ege2le3  12222  bitsfval  12493  nninfctlemfo  12601  qnumval  12747  qdenval  12748  odzval  12804  pcmpt  12906  1arithlem1  12926  elply2  15449  peano4nninf  16544  peano3nninf  16545  nninfsellemeq  16552
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