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Theorem funimassov 6109
Description: Membership relation for the values of a function whose image is a subclass. (Contributed by Mario Carneiro, 23-Dec-2013.)
Assertion
Ref Expression
funimassov  |-  ( ( Fun  F  /\  ( A  X.  B )  C_  dom  F )  ->  (
( F " ( A  X.  B ) ) 
C_  C  <->  A. x  e.  A  A. y  e.  B  ( x F y )  e.  C ) )
Distinct variable groups:    x, y, A   
x, B, y    x, C, y    x, F, y

Proof of Theorem funimassov
Dummy variable  z is distinct from all other variables.
StepHypRef Expression
1 funimass4 5642 . 2  |-  ( ( Fun  F  /\  ( A  X.  B )  C_  dom  F )  ->  (
( F " ( A  X.  B ) ) 
C_  C  <->  A. z  e.  ( A  X.  B
) ( F `  z )  e.  C
) )
2 fveq2 5589 . . . . 5  |-  ( z  =  <. x ,  y
>.  ->  ( F `  z )  =  ( F `  <. x ,  y >. )
)
3 df-ov 5960 . . . . 5  |-  ( x F y )  =  ( F `  <. x ,  y >. )
42, 3eqtr4di 2257 . . . 4  |-  ( z  =  <. x ,  y
>.  ->  ( F `  z )  =  ( x F y ) )
54eleq1d 2275 . . 3  |-  ( z  =  <. x ,  y
>.  ->  ( ( F `
 z )  e.  C  <->  ( x F y )  e.  C
) )
65ralxp 4829 . 2  |-  ( A. z  e.  ( A  X.  B ) ( F `
 z )  e.  C  <->  A. x  e.  A  A. y  e.  B  ( x F y )  e.  C )
71, 6bitrdi 196 1  |-  ( ( Fun  F  /\  ( A  X.  B )  C_  dom  F )  ->  (
( F " ( A  X.  B ) ) 
C_  C  <->  A. x  e.  A  A. y  e.  B  ( x F y )  e.  C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1373    e. wcel 2177   A.wral 2485    C_ wss 3170   <.cop 3641    X. cxp 4681   dom cdm 4683   "cima 4686   Fun wfun 5274   ` cfv 5280  (class class class)co 5957
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 2180  ax-ext 2188  ax-sep 4170  ax-pow 4226  ax-pr 4261
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ral 2490  df-rex 2491  df-v 2775  df-sbc 3003  df-csb 3098  df-un 3174  df-in 3176  df-ss 3183  df-pw 3623  df-sn 3644  df-pr 3645  df-op 3647  df-uni 3857  df-iun 3935  df-br 4052  df-opab 4114  df-id 4348  df-xp 4689  df-rel 4690  df-cnv 4691  df-co 4692  df-dm 4693  df-rn 4694  df-res 4695  df-ima 4696  df-iota 5241  df-fun 5282  df-fn 5283  df-fv 5288  df-ov 5960
This theorem is referenced by: (None)
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