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Theorem f0cli 7094
Description: Unconditional closure of a function when the codomain includes the empty set. (Contributed by Mario Carneiro, 12-Sep-2013.)
Hypotheses
Ref Expression
f0cl.1 𝐹:𝐴𝐵
f0cl.2 ∅ ∈ 𝐵
Assertion
Ref Expression
f0cli (𝐹𝐶) ∈ 𝐵

Proof of Theorem f0cli
StepHypRef Expression
1 f0cl.1 . . 3 𝐹:𝐴𝐵
21ffvelcdmi 7079 . 2 (𝐶𝐴 → (𝐹𝐶) ∈ 𝐵)
31fdmi 6718 . . . 4 dom 𝐹 = 𝐴
43eleq2i 2861 . . 3 (𝐶 ∈ dom 𝐹𝐶𝐴)
5 ndmfv 6914 . . . 4 𝐶 ∈ dom 𝐹 → (𝐹𝐶) = ∅)
6 f0cl.2 . . . 4 ∅ ∈ 𝐵
75, 6eqeltrdi 2877 . . 3 𝐶 ∈ dom 𝐹 → (𝐹𝐶) ∈ 𝐵)
84, 7sylnbir 334 . 2 𝐶𝐴 → (𝐹𝐶) ∈ 𝐵)
92, 8pm2.61i 184 1 (𝐹𝐶) ∈ 𝐵
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2149  c0 4292  dom cdm 5662  wf 6533  cfv 6537
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-12 2219  ax-ext 2741  ax-sep 5259  ax-nul 5271  ax-pr 5405
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3423  df-v 3463  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4491  df-sn 4593  df-pr 4595  df-op 4599  df-uni 4875  df-br 5112  df-opab 5176  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-fv 6545
This theorem is referenced by:  harcl  9521  cantnfvalf  9634  rankon  9767  cardon  9930  alephon  10053  ackbij1lem13  10214  ackbij1b  10221  cfon  10238  ixxssxr  13384  sadcf  16511  smupf  16536  iccordt  23340  nodense  27822  bdayon  27911  madessno  27999  oldssno  28000  newssno  28001
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