reserve a,b,c for set;

theorem
  for D being non empty set,f,g being FinSequence of D holds ovlcon(f,g)
  = ovlldiff(f,g) ^ g
proof
  let D be non empty set,f,g be FinSequence of D;
  ovlcon(f,g) = ovlldiff(f,g)^(ovlpart(f,g)^ovlrdiff(f,g)) by FINSEQ_8:12;
  hence thesis by Th31;
end;
