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Theorem mptrcl 6950
Description: Reverse closure for a mapping: If the function value of a mapping has a member, the argument belongs to the base class of the mapping. (Contributed by AV, 4-Apr-2020.)
Hypothesis
Ref Expression
mptrcl.1 𝐹 = (𝑥𝐴𝐵)
Assertion
Ref Expression
mptrcl (𝐼 ∈ (𝐹𝑋) → 𝑋𝐴)
Distinct variable group:   𝑥,𝐴
Allowed substitution hints:   𝐵(𝑥)   𝐹(𝑥)   𝐼(𝑥)   𝑋(𝑥)

Proof of Theorem mptrcl
StepHypRef Expression
1 n0i 4292 . 2 (𝐼 ∈ (𝐹𝑋) → ¬ (𝐹𝑋) = ∅)
2 mptrcl.1 . . . . 5 𝐹 = (𝑥𝐴𝐵)
32dmmptss 6199 . . . 4 dom 𝐹𝐴
43sseli 3929 . . 3 (𝑋 ∈ dom 𝐹𝑋𝐴)
5 ndmfv 6866 . . 3 𝑋 ∈ dom 𝐹 → (𝐹𝑋) = ∅)
64, 5nsyl4 158 . 2 (¬ (𝐹𝑋) = ∅ → 𝑋𝐴)
71, 6syl 17 1 (𝐼 ∈ (𝐹𝑋) → 𝑋𝐴)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1541  wcel 2113  c0 4285  cmpt 5179  dom cdm 5624  cfv 6492
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pr 5377
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-rab 3400  df-v 3442  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-br 5099  df-opab 5161  df-mpt 5180  df-xp 5630  df-rel 5631  df-cnv 5632  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fv 6500
This theorem is referenced by:  bitsval  16351  subcrcl  17740  initorcl  17914  termorcl  17915  zeroorcl  17916  submrcl  18727  issubg  19056  isnsg  19084  issubrng  20480  issubrg  20504  issdrg  20721  abvrcl  20746  isobs  21675  mhprcl  22086  islocfin  23461  kgeni  23481  elmptrab  23771  isphtpc  24949  cfili  25224  cfilfcls  25230  plybss  26155  eleenn  28969  neircl  49146  sectrcl  49263  invrcl  49265  isorcl  49274  sectpropdlem  49277  invpropdlem  49279  isopropdlem  49281  lmdrcl  49892  cmdrcl  49893  lmdfval2  49896  cmdfval2  49897
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