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Theorem fex2 5464
Description: A function with bounded domain and codomain is a set. This version is proven without the Axiom of Replacement. (Contributed by Mario Carneiro, 24-Jun-2015.)
Assertion
Ref Expression
fex2  |-  ( ( F : A --> B  /\  A  e.  V  /\  B  e.  W )  ->  F  e.  _V )

Proof of Theorem fex2
StepHypRef Expression
1 xpexg 4807 . . 3  |-  ( ( A  e.  V  /\  B  e.  W )  ->  ( A  X.  B
)  e.  _V )
213adant1 1018 . 2  |-  ( ( F : A --> B  /\  A  e.  V  /\  B  e.  W )  ->  ( A  X.  B
)  e.  _V )
3 fssxp 5463 . . 3  |-  ( F : A --> B  ->  F  C_  ( A  X.  B ) )
433ad2ant1 1021 . 2  |-  ( ( F : A --> B  /\  A  e.  V  /\  B  e.  W )  ->  F  C_  ( A  X.  B ) )
52, 4ssexd 4200 1  |-  ( ( F : A --> B  /\  A  e.  V  /\  B  e.  W )  ->  F  e.  _V )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 981    e. wcel 2178   _Vcvv 2776    C_ wss 3174    X. cxp 4691   -->wf 5286
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-13 2180  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269  ax-un 4498
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 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-uni 3865  df-br 4060  df-opab 4122  df-xp 4699  df-rel 4700  df-cnv 4701  df-dm 4703  df-rn 4704  df-fun 5292  df-fn 5293  df-f 5294
This theorem is referenced by:  elmapg  6771  f1oen2g  6869  f1dom2g  6870  dom3d  6888  mapxpen  6970  addex  9808  mulex  9809  climrecvg1n  11774  cnpfval  14782  txcn  14862  blfvalps  14972
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