@MISC{RCOMP_2.MIZ,
  AUTHOR = {Nakamura, Yatsuka},
  TITLE = {Half Open Intervals in Real Numbers},
  DAY = {01},
  MONTH = {February},
  YEAR = {2002},
  ADDRESS1 = {Shinshu University\\Nagano},
  SUMMARY = {Left and right half open intervals in the real line are defined.
Their properties are investigated.  A class of all finite union of such
intervals are, in a sense, closed by operations of union, intersection
and the difference of sets.}}

