MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  f0cli Structured version   Visualization version   GIF version

Theorem f0cli 7098
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:𝐴⟶𝐵
f0cl.2 ∅ ∈ 𝐵
Assertion
Ref Expression
f0cli (𝐹‘𝐶) ∈ 𝐵

Proof of Theorem f0cli
StepHypRef Expression
1 f0cl.1 . . 3 𝐹:𝐴⟶𝐵
21ffvelcdmi 7083 . 2 (𝐶 ∈ 𝐴 → (𝐹‘𝐶) ∈ 𝐵)
31fdmi 6721 . . . 4 dom 𝐹 = 𝐴
43eleq2i 2852 . . 3 (𝐶 ∈ dom 𝐹 ↔ 𝐶 ∈ 𝐴)
5 ndmfv 6917 . . . 4 (¬ 𝐶 ∈ dom 𝐹 → (𝐹‘𝐶) = ∅)
6 f0cl.2 . . . 4 ∅ ∈ 𝐵
75, 6eqeltrdi 2868 . . 3 (¬ 𝐶 ∈ dom 𝐹 → (𝐹‘𝐶) ∈ 𝐵)
84, 7sylnbir 334 . 2 (¬ 𝐶 ∈ 𝐴 → (𝐹‘𝐶) ∈ 𝐵)
92, 8pm2.61i 184 1 (𝐹‘𝐶) ∈ 𝐵
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  ¬ wn 3   ∈ wcel 2144  ∅c0 4278  dom cdm 5650  ⟶wf 6534  ‘cfv 6538
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5390
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-id 5545  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-fv 6546
This theorem is used by:  harcl  9553  cantnfvalf  9666  rankon  9803  cardon  10025  alephon  10148  ackbij1lem13  10309  ackbij1b  10316  cfon  10332  ixxssxr  13488  sadcf  16623  smupf  16648  iccordt  23532  nodense  28049  bdayon  28138  madessno  28226  oldssno  28227  newssno  28228
  Copyright terms: Public domain W3C validator