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Theorem resmpt 5026
Description: Restriction of the mapping operation. (Contributed by Mario Carneiro, 15-Jul-2013.)
Assertion
Ref Expression
resmpt  |-  ( B 
C_  A  ->  (
( x  e.  A  |->  C )  |`  B )  =  ( x  e.  B  |->  C ) )
Distinct variable groups:    x, A    x, B
Allowed substitution hint:    C( x)

Proof of Theorem resmpt
Dummy variable  y is distinct from all other variables.
StepHypRef Expression
1 resopab2 5025 . 2  |-  ( B 
C_  A  ->  ( { <. x ,  y
>.  |  ( x  e.  A  /\  y  =  C ) }  |`  B )  =  { <. x ,  y >.  |  ( x  e.  B  /\  y  =  C ) } )
2 df-mpt 4123 . . 3  |-  ( x  e.  A  |->  C )  =  { <. x ,  y >.  |  ( x  e.  A  /\  y  =  C ) }
32reseq1i 4974 . 2  |-  ( ( x  e.  A  |->  C )  |`  B )  =  ( { <. x ,  y >.  |  ( x  e.  A  /\  y  =  C ) }  |`  B )
4 df-mpt 4123 . 2  |-  ( x  e.  B  |->  C )  =  { <. x ,  y >.  |  ( x  e.  B  /\  y  =  C ) }
51, 3, 43eqtr4g 2265 1  |-  ( B 
C_  A  ->  (
( x  e.  A  |->  C )  |`  B )  =  ( x  e.  B  |->  C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1373    e. wcel 2178    C_ wss 3174   {copab 4120    |-> cmpt 4121    |` cres 4695
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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ral 2491  df-rex 2492  df-v 2778  df-un 3178  df-in 3180  df-ss 3187  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-opab 4122  df-mpt 4123  df-xp 4699  df-rel 4700  df-res 4705
This theorem is referenced by:  resmpt3  5027  resmptf  5028  resmptd  5029  f1stres  6268  f2ndres  6269  tposss  6355  dftpos2  6370  dftpos4  6372  djuf1olemr  7182  fisumss  11818  isumclim3  11849  expcnv  11930  fprodssdc  12016  conjsubg  13728  gsumfzfsumlemm  14464  tgrest  14756  cnmptid  14868  hovercncf  15233  dvidlemap  15278  dvidrelem  15279  dvidsslem  15280  dvcnp2cntop  15286  dvmulxxbr  15289  dvcoapbr  15294  dvrecap  15300
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