ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  tr0 Unicode version

Theorem tr0 4032
Description: The empty set is transitive. (Contributed by NM, 16-Sep-1993.)
Assertion
Ref Expression
tr0  |-  Tr  (/)

Proof of Theorem tr0
StepHypRef Expression
1 0ss 3396 . 2  |-  (/)  C_  ~P (/)
2 dftr4 4026 . 2  |-  ( Tr  (/) 
<->  (/)  C_  ~P (/) )
31, 2mpbir 145 1  |-  Tr  (/)
Colors of variables: wff set class
Syntax hints:    C_ wss 3066   (/)c0 3358   ~Pcpw 3505   Tr wtr 4021
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 603  ax-in2 604  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119
This theorem depends on definitions:  df-bi 116  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-v 2683  df-dif 3068  df-in 3072  df-ss 3079  df-nul 3359  df-pw 3507  df-uni 3732  df-tr 4022
This theorem is referenced by:  ord0  4308  ordom  4515
  Copyright terms: Public domain W3C validator