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Theorem f0cli 6971
Description: Unconditional closure of a function when the range 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
21ffvelrni 6957 . 2 (𝐶𝐴 → (𝐹𝐶) ∈ 𝐵)
31fdmi 6610 . . . 4 dom 𝐹 = 𝐴
43eleq2i 2832 . . 3 (𝐶 ∈ dom 𝐹𝐶𝐴)
5 ndmfv 6801 . . . 4 𝐶 ∈ dom 𝐹 → (𝐹𝐶) = ∅)
6 f0cl.2 . . . 4 ∅ ∈ 𝐵
75, 6eqeltrdi 2849 . . 3 𝐶 ∈ dom 𝐹 → (𝐹𝐶) ∈ 𝐵)
84, 7sylnbir 331 . 2 𝐶𝐴 → (𝐹𝐶) ∈ 𝐵)
92, 8pm2.61i 182 1 (𝐹𝐶) ∈ 𝐵
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2110  c0 4262  dom cdm 5590  wf 6428  cfv 6432
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1975  ax-7 2015  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2711  ax-sep 5227  ax-nul 5234  ax-pr 5356
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1545  df-fal 1555  df-ex 1787  df-nf 1791  df-sb 2072  df-mo 2542  df-eu 2571  df-clab 2718  df-cleq 2732  df-clel 2818  df-nfc 2891  df-ral 3071  df-rex 3072  df-rab 3075  df-v 3433  df-dif 3895  df-un 3897  df-in 3899  df-ss 3909  df-nul 4263  df-if 4466  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4846  df-br 5080  df-opab 5142  df-id 5490  df-xp 5596  df-rel 5597  df-cnv 5598  df-co 5599  df-dm 5600  df-rn 5601  df-iota 6390  df-fun 6434  df-fn 6435  df-f 6436  df-fv 6440
This theorem is referenced by:  harcl  9306  cantnfvalf  9411  rankon  9564  cardon  9713  alephon  9836  ackbij1lem13  9999  ackbij1b  10006  ixxssxr  13102  sadcf  16171  smupf  16196  iccordt  22376  nodense  33904  bdayelon  33980  madessno  34053  oldssno  34054  newssno  34055
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