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Theorem dmmptss 5107
Description: The domain of a mapping is a subset of its base class. (Contributed by Scott Fenton, 17-Jun-2013.)
Hypothesis
Ref Expression
dmmpo.1 𝐹 = (𝑥𝐴𝐵)
Assertion
Ref Expression
dmmptss dom 𝐹𝐴
Distinct variable group:   𝑥,𝐴
Allowed substitution hints:   𝐵(𝑥)   𝐹(𝑥)

Proof of Theorem dmmptss
StepHypRef Expression
1 dmmpo.1 . . 3 𝐹 = (𝑥𝐴𝐵)
21dmmpt 5106 . 2 dom 𝐹 = {𝑥𝐴𝐵 ∈ V}
3 ssrab2 3232 . 2 {𝑥𝐴𝐵 ∈ V} ⊆ 𝐴
42, 3eqsstri 3179 1 dom 𝐹𝐴
Colors of variables: wff set class
Syntax hints:   = wceq 1348  wcel 2141  {crab 2452  Vcvv 2730  wss 3121  cmpt 4050  dom cdm 4611
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-br 3990  df-opab 4051  df-mpt 4052  df-xp 4617  df-rel 4618  df-cnv 4619  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624
This theorem is referenced by:  mptrcl  5578  fvmptssdm  5580  elfvmptrab1  5590  mptexg  5721  mptexw  6092  dmmpossx  6178  tposssxp  6228  lmrcl  12985  cnprcl2k  13000  isxms2  13246
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