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Theorem mptrcl 7006
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 4296 . 2 (𝐼 ∈ (𝐹𝑋) → ¬ (𝐹𝑋) = ∅)
2 mptrcl.1 . . . . 5 𝐹 = (𝑥𝐴𝐵)
32dmmptss 6247 . . . 4 dom 𝐹𝐴
43sseli 3936 . . 3 (𝑋 ∈ dom 𝐹𝑋𝐴)
5 ndmfv 6920 . . 3 𝑋 ∈ dom 𝐹 → (𝐹𝑋) = ∅)
64, 5nsyl4 159 . 2 (¬ (𝐹𝑋) = ∅ → 𝑋𝐴)
71, 6syl 18 1 (𝐼 ∈ (𝐹𝑋) → 𝑋𝐴)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3  wi 4   = wceq 1570  wcel 2146  c0 4289  cmpt 5197  dom cdm 5666  cfv 6543
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-sep 5262  ax-nul 5274  ax-pr 5409
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ne 2962  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4878  df-br 5115  df-opab 5179  df-mpt 5198  df-xp 5672  df-rel 5673  df-cnv 5674  df-dm 5676  df-rn 5677  df-res 5678  df-ima 5679  df-iota 6499  df-fv 6551
This theorem is used by:  bitsval  16507  subcrcl  17898  initorcl  18072  termorcl  18073  zeroorcl  18074  submrcl  18891  issubg  19223  isnsg  19252  issubrng  20683  issubrg  20707  issdrg  20928  abvrcl  20953  isobs  21907  mhprcl  22343  islocfin  23711  kgeni  23731  elmptrab  24021  isphtpc  25190  cfili  25464  cfilfcls  25470  plybss  26388  eleenn  29283  neircl  49724  sectrcl  49841  invrcl  49843  isorcl  49852  sectpropdlem  49855  invpropdlem  49857  isopropdlem  49859  lmdrcl  50470  cmdrcl  50471  lmdfval2  50474  cmdfval2  50475
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