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Theorem cores 5503
Description: Restricted first member of a class composition. (Contributed by NM, 12-Oct-2004.) (Proof shortened by Andrew Salmon, 27-Aug-2011.)
Assertion
Ref Expression
cores  |-  ( ran 
B  C_  C  ->  ( ( A  |`  C )  o.  B )  =  ( A  o.  B
) )

Proof of Theorem cores
Dummy variables  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 vex 3111 . . . . . . 7  |-  z  e. 
_V
2 vex 3111 . . . . . . 7  |-  y  e. 
_V
31, 2brelrn 5226 . . . . . 6  |-  ( z B y  ->  y  e.  ran  B )
4 ssel 3493 . . . . . 6  |-  ( ran 
B  C_  C  ->  ( y  e.  ran  B  ->  y  e.  C ) )
5 vex 3111 . . . . . . . 8  |-  x  e. 
_V
65brres 5273 . . . . . . 7  |-  ( y ( A  |`  C ) x  <->  ( y A x  /\  y  e.  C ) )
76rbaib 900 . . . . . 6  |-  ( y  e.  C  ->  (
y ( A  |`  C ) x  <->  y A x ) )
83, 4, 7syl56 34 . . . . 5  |-  ( ran 
B  C_  C  ->  ( z B y  -> 
( y ( A  |`  C ) x  <->  y A x ) ) )
98pm5.32d 639 . . . 4  |-  ( ran 
B  C_  C  ->  ( ( z B y  /\  y ( A  |`  C ) x )  <-> 
( z B y  /\  y A x ) ) )
109exbidv 1685 . . 3  |-  ( ran 
B  C_  C  ->  ( E. y ( z B y  /\  y
( A  |`  C ) x )  <->  E. y
( z B y  /\  y A x ) ) )
1110opabbidv 4505 . 2  |-  ( ran 
B  C_  C  ->  {
<. z ,  x >.  |  E. y ( z B y  /\  y
( A  |`  C ) x ) }  =  { <. z ,  x >.  |  E. y ( z B y  /\  y A x ) } )
12 df-co 5003 . 2  |-  ( ( A  |`  C )  o.  B )  =  { <. z ,  x >.  |  E. y ( z B y  /\  y
( A  |`  C ) x ) }
13 df-co 5003 . 2  |-  ( A  o.  B )  =  { <. z ,  x >.  |  E. y ( z B y  /\  y A x ) }
1411, 12, 133eqtr4g 2528 1  |-  ( ran 
B  C_  C  ->  ( ( A  |`  C )  o.  B )  =  ( A  o.  B
) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 184    /\ wa 369    = wceq 1374   E.wex 1591    e. wcel 1762    C_ wss 3471   class class class wbr 4442   {copab 4499   ran crn 4995    |` cres 4996    o. ccom 4998
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1596  ax-4 1607  ax-5 1675  ax-6 1714  ax-7 1734  ax-9 1766  ax-10 1781  ax-11 1786  ax-12 1798  ax-13 1963  ax-ext 2440  ax-sep 4563  ax-nul 4571  ax-pr 4681
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 970  df-tru 1377  df-ex 1592  df-nf 1595  df-sb 1707  df-eu 2274  df-mo 2275  df-clab 2448  df-cleq 2454  df-clel 2457  df-nfc 2612  df-ne 2659  df-ral 2814  df-rex 2815  df-rab 2818  df-v 3110  df-dif 3474  df-un 3476  df-in 3478  df-ss 3485  df-nul 3781  df-if 3935  df-sn 4023  df-pr 4025  df-op 4029  df-br 4443  df-opab 4501  df-xp 5000  df-cnv 5002  df-co 5003  df-dm 5004  df-rn 5005  df-res 5006
This theorem is referenced by:  cocnvcnv1  5511  cores2  5513  relcoi2  5528  fco2  5735  fcoi2  5753  domss2  7668  canthp1lem2  9022  imasdsval2  14762  frmdss2  15849  gsumval3OLD  16694  gsumval3lem1  16695  gsumzres  16700  gsumzresOLD  16704  gsumzaddlem  16720  gsumzaddlemOLD  16722  dprdf1  16865  kgencn2  19788  tsmsf1o  20377  hhssims  25855  eulerpartgbij  27939  lgamcvg2  28225  cvmlift2lem9a  28376  fourierdlem53  31417  funresfunco  31634
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