ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  sn0cld GIF version

Theorem sn0cld 14860
Description: The closed sets of the topology {∅}. (Contributed by FL, 5-Jan-2009.)
Assertion
Ref Expression
sn0cld (Clsd‘{∅}) = {∅}

Proof of Theorem sn0cld
StepHypRef Expression
1 0ex 4216 . . 3 ∅ ∈ V
2 discld 14859 . . 3 (∅ ∈ V → (Clsd‘𝒫 ∅) = 𝒫 ∅)
31, 2ax-mp 5 . 2 (Clsd‘𝒫 ∅) = 𝒫 ∅
4 pw0 3820 . . 3 𝒫 ∅ = {∅}
54fveq2i 5642 . 2 (Clsd‘𝒫 ∅) = (Clsd‘{∅})
63, 5, 43eqtr3i 2260 1 (Clsd‘{∅}) = {∅}
Colors of variables: wff set class
Syntax hints:   = wceq 1397  wcel 2202  Vcvv 2802  c0 3494  𝒫 cpw 3652  {csn 3669  cfv 5326  Clsdccld 14815
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334  df-top 14721  df-cld 14818
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator