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Theorem mptrabex 5745
Description: If the domain of a function given by maps-to notation is a class abstraction based on a set, the function is a set. (Contributed by AV, 16-Jul-2019.) (Revised by AV, 26-Mar-2021.)
Hypothesis
Ref Expression
mptrabex.1  |-  A  e. 
_V
Assertion
Ref Expression
mptrabex  |-  ( x  e.  { y  e.  A  |  ph }  |->  B )  e.  _V
Distinct variable groups:    x, y, A    ph, x
Allowed substitution hints:    ph( y)    B( x, y)

Proof of Theorem mptrabex
StepHypRef Expression
1 mptrabex.1 . . 3  |-  A  e. 
_V
21rabex 4148 . 2  |-  { y  e.  A  |  ph }  e.  _V
32mptex 5743 1  |-  ( x  e.  { y  e.  A  |  ph }  |->  B )  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 2148   {crab 2459   _Vcvv 2738    |-> cmpt 4065
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-coll 4119  ax-sep 4122  ax-pow 4175  ax-pr 4210
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-reu 2462  df-rab 2464  df-v 2740  df-sbc 2964  df-csb 3059  df-un 3134  df-in 3136  df-ss 3143  df-pw 3578  df-sn 3599  df-pr 3600  df-op 3602  df-uni 3811  df-iun 3889  df-br 4005  df-opab 4066  df-mpt 4067  df-id 4294  df-xp 4633  df-rel 4634  df-cnv 4635  df-co 4636  df-dm 4637  df-rn 4638  df-res 4639  df-ima 4640  df-iota 5179  df-fun 5219  df-fn 5220  df-f 5221  df-f1 5222  df-fo 5223  df-f1o 5224  df-fv 5225
This theorem is referenced by:  odzval  12241
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