ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  p0ex GIF version

Theorem p0ex 3939
Description: The power set of the empty set (the ordinal 1) is a set. (Contributed by NM, 23-Dec-1993.)
Assertion
Ref Expression
p0ex {∅} ∈ V

Proof of Theorem p0ex
StepHypRef Expression
1 pw0 3511 . 2 𝒫 ∅ = {∅}
2 0ex 3884 . . 3 ∅ ∈ V
32pwex 3932 . 2 𝒫 ∅ ∈ V
41, 3eqeltrri 2111 1 {∅} ∈ V
Colors of variables: wff set class
Syntax hints:  wcel 1393  Vcvv 2557  c0 3224  𝒫 cpw 3359  {csn 3375
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-in1 544  ax-in2 545  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875  ax-nul 3883  ax-pow 3927
This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-dif 2920  df-in 2924  df-ss 2931  df-nul 3225  df-pw 3361  df-sn 3381
This theorem is referenced by:  pp0ex  3940  ordtriexmidlem  4245  ontr2exmid  4250  onsucsssucexmid  4252  onsucelsucexmid  4255  regexmidlemm  4257  ordsoexmid  4286  ordtri2or2exmid  4296  opthprc  4391  acexmidlema  5503  acexmidlem2  5509  tposexg  5873  2dom  6285  endisj  6298  ssfiexmid  6336
  Copyright terms: Public domain W3C validator