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Theorem ovssunirng 5960
Description: The result of an operation value is always a subset of the union of the range. (Contributed by Mario Carneiro, 12-Jan-2017.)
Assertion
Ref Expression
ovssunirng  |-  ( ( X  e.  V  /\  Y  e.  W )  ->  ( X F Y )  C_  U. ran  F
)

Proof of Theorem ovssunirng
StepHypRef Expression
1 df-ov 5928 . 2  |-  ( X F Y )  =  ( F `  <. X ,  Y >. )
2 opexg 4262 . . 3  |-  ( ( X  e.  V  /\  Y  e.  W )  -> 
<. X ,  Y >.  e. 
_V )
3 fvssunirng 5576 . . 3  |-  ( <. X ,  Y >.  e. 
_V  ->  ( F `  <. X ,  Y >. ) 
C_  U. ran  F )
42, 3syl 14 . 2  |-  ( ( X  e.  V  /\  Y  e.  W )  ->  ( F `  <. X ,  Y >. )  C_ 
U. ran  F )
51, 4eqsstrid 3230 1  |-  ( ( X  e.  V  /\  Y  e.  W )  ->  ( X F Y )  C_  U. ran  F
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    e. wcel 2167   _Vcvv 2763    C_ wss 3157   <.cop 3626   U.cuni 3840   ran crn 4665   ` cfv 5259  (class class class)co 5925
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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-v 2765  df-un 3161  df-in 3163  df-ss 3170  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-br 4035  df-opab 4096  df-cnv 4672  df-dm 4674  df-rn 4675  df-iota 5220  df-fv 5267  df-ov 5928
This theorem is referenced by:  prdsvallem  12974
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