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Theorem nelrnfvne 7082
Description: A function value cannot be any element not contained in the range of the function. (Contributed by AV, 28-Jan-2020.)
Assertion
Ref Expression
nelrnfvne ((Fun 𝐹𝑋 ∈ dom 𝐹𝑌 ∉ ran 𝐹) → (𝐹𝑋) ≠ 𝑌)

Proof of Theorem nelrnfvne
StepHypRef Expression
1 fvelrn 7081 . 2 ((Fun 𝐹𝑋 ∈ dom 𝐹) → (𝐹𝑋) ∈ ran 𝐹)
2 elnelne2 3048 . 2 (((𝐹𝑋) ∈ ran 𝐹𝑌 ∉ ran 𝐹) → (𝐹𝑋) ≠ 𝑌)
31, 2stoic3 1770 1 ((Fun 𝐹𝑋 ∈ dom 𝐹𝑌 ∉ ran 𝐹) → (𝐹𝑋) ≠ 𝑌)
Colors of variables: wff setvar class
Syntax hints:  wi 4  w3a 1084  wcel 2098  wne 2930  wnel 3036  dom cdm 5672  ran crn 5673  Fun wfun 6537  cfv 6543
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-12 2166  ax-ext 2696  ax-sep 5294  ax-nul 5301  ax-pr 5423
This theorem depends on definitions:  df-bi 206  df-an 395  df-or 846  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2528  df-eu 2557  df-clab 2703  df-cleq 2717  df-clel 2802  df-ne 2931  df-nel 3037  df-ral 3052  df-rex 3061  df-rab 3420  df-v 3465  df-dif 3942  df-un 3944  df-ss 3956  df-nul 4319  df-if 4525  df-sn 4625  df-pr 4627  df-op 4631  df-uni 4904  df-br 5144  df-opab 5206  df-id 5570  df-xp 5678  df-rel 5679  df-cnv 5680  df-co 5681  df-dm 5682  df-rn 5683  df-iota 6495  df-fun 6545  df-fn 6546  df-fv 6551
This theorem is referenced by:  fveqdmss  7083  fveqressseq  7084
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