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Theorem mptrabex 5790
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 4177 . 2  |-  { y  e.  A  |  ph }  e.  _V
32mptex 5788 1  |-  ( x  e.  { y  e.  A  |  ph }  |->  B )  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 2167   {crab 2479   _Vcvv 2763    |-> cmpt 4094
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-coll 4148  ax-sep 4151  ax-pow 4207  ax-pr 4242
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-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266
This theorem is referenced by:  odzval  12410
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