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Theorem mptrcl 6989
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 4295 . 2 (𝐼 ∈ (𝐹𝑋) → ¬ (𝐹𝑋) = ∅)
2 mptrcl.1 . . . . 5 𝐹 = (𝑥𝐴𝐵)
32dmmptss 6232 . . . 4 dom 𝐹𝐴
43sseli 3935 . . 3 (𝑋 ∈ dom 𝐹𝑋𝐴)
5 ndmfv 6903 . . 3 𝑋 ∈ dom 𝐹 → (𝐹𝑋) = ∅)
64, 5nsyl4 159 . 2 (¬ (𝐹𝑋) = ∅ → 𝑋𝐴)
71, 6syl 18 1 (𝐼 ∈ (𝐹𝑋) → 𝑋𝐴)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4   = wceq 1563  wcel 2145  c0 4288  cmpt 5186  dom cdm 5652  cfv 6525
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-nul 5261  ax-pr 5395
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-rab 3418  df-v 3459  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-opab 5168  df-mpt 5187  df-xp 5658  df-rel 5659  df-cnv 5660  df-dm 5662  df-rn 5663  df-res 5664  df-ima 5665  df-iota 6481  df-fv 6533
This theorem is referenced by:  bitsval  16472  subcrcl  17863  initorcl  18037  termorcl  18038  zeroorcl  18039  submrcl  18850  issubg  19183  isnsg  19212  issubrng  20623  issubrg  20647  issdrg  20860  abvrcl  20885  isobs  21830  mhprcl  22266  islocfin  23635  kgeni  23655  elmptrab  23945  isphtpc  25114  cfili  25388  cfilfcls  25394  plybss  26312  eleenn  29155  neircl  49534  sectrcl  49651  invrcl  49653  isorcl  49662  sectpropdlem  49665  invpropdlem  49667  isopropdlem  49669  lmdrcl  50280  cmdrcl  50281  lmdfval2  50284  cmdfval2  50285
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