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Theorem mptrabex 5877
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 4232 . 2  |-  { y  e.  A  |  ph }  e.  _V
32mptex 5875 1  |-  ( x  e.  { y  e.  A  |  ph }  |->  B )  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 2200   {crab 2512   _Vcvv 2800    |-> cmpt 4148
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-coll 4202  ax-sep 4205  ax-pow 4262  ax-pr 4297
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2802  df-sbc 3030  df-csb 3126  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-iun 3970  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fn 5327  df-f 5328  df-f1 5329  df-fo 5330  df-f1o 5331  df-fv 5332
This theorem is referenced by:  odzval  12804
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