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Theorem mptexf 45215
Description: If the domain of a function given by maps-to notation is a set, the function is a set. Inference version of mptexg 7161. (Contributed by Glauco Siliprandi, 23-Oct-2021.)
Hypotheses
Ref Expression
mptexf.1 𝑥𝐴
mptexf.2 𝐴 ∈ V
Assertion
Ref Expression
mptexf (𝑥𝐴𝐵) ∈ V

Proof of Theorem mptexf
StepHypRef Expression
1 mptexf.2 . 2 𝐴 ∈ V
2 mptexf.1 . . 3 𝑥𝐴
32mptexgf 7162 . 2 (𝐴 ∈ V → (𝑥𝐴𝐵) ∈ V)
41, 3ax-mp 5 1 (𝑥𝐴𝐵) ∈ V
Colors of variables: wff setvar class
Syntax hints:  wcel 2109  wnfc 2876  Vcvv 3438  cmpt 5176
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5221  ax-sep 5238  ax-nul 5248  ax-pr 5374
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3346  df-rab 3397  df-v 3440  df-sbc 3745  df-csb 3854  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4479  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-iun 4946  df-br 5096  df-opab 5158  df-mpt 5177  df-id 5518  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-rn 5634  df-res 5635  df-ima 5636  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494
This theorem is referenced by:  limsupequzmpt2  45700  liminfequzmpt2  45773  smflimsuplem2  46803  smflimsuplem5  46806
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