# The lambda-term \Omega
# This book is not accepted in AUT-QE because [y:'type'] is not allowed
# This book is accepted in lambda-delta with sort inclusion but Omega is not
#    valid if sort inclusion is allowed on the term backbone only
# This book is valid in lambda-delta with unrestricted sort inclusion 

+l 
@ Delta := [x:[y:'type']'type']<x>x : [x:[y:'type']'type']'type'
  Omega := <Delta>Delta             : 'type'
-l