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

Theorem mrcsncl 17663
Description: The Moore closure of a singleton is a closed set. (Contributed by Stefan O'Rear, 31-Jan-2015.)
Hypothesis
Ref Expression
mrcfval.f 𝐹 = (mrCls‘𝐶)
Assertion
Ref Expression
mrcsncl ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈𝑋) → (𝐹‘{𝑈}) ∈ 𝐶)

Proof of Theorem mrcsncl
StepHypRef Expression
1 snssi 4751 . 2 (𝑈𝑋 → {𝑈} ⊆ 𝑋)
2 mrcfval.f . . 3 𝐹 = (mrCls‘𝐶)
32mrccl 17662 . 2 ((𝐶 ∈ (Moore‘𝑋) ∧ {𝑈} ⊆ 𝑋) → (𝐹‘{𝑈}) ∈ 𝐶)
41, 3sylan2 604 1 ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈𝑋) → (𝐹‘{𝑈}) ∈ 𝐶)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  wss 3905  {csn 4589  cfv 6536  Moorecmre 17629  mrClscmrc 17630
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5257  ax-nul 5269  ax-pow 5336  ax-pr 5404  ax-un 7732
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-pw 4564  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-int 4913  df-br 5110  df-opab 5174  df-mpt 5193  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-fv 6544  df-mre 17633  df-mrc 17634
This theorem is referenced by:  pgpfac1lem1  20141  pgpfac1lem2  20142  pgpfac1lem3a  20143  pgpfac1lem3  20144  pgpfac1lem4  20145  pgpfac1lem5  20146  pgpfaclem1  20148  pgpfaclem2  20149
  Copyright terms: Public domain W3C validator