'Allow I{greater than} comparison with another L{SerialNumber} instance.
@type other: L{SerialNumber}
@rtype: L{bool}'

def __gt__(self, other):

    other = self._convertOther(other)
    return (((self._number < other._number) and ((other._number - self._number) > self._halfRing)) or ((self._number > other._number) and ((self._number - other._number) < self._halfRing)))
