@MISC{RCOMP_1.MIZ,
  AUTHOR = {Raczkowski, Konrad and Sadowski, Pawe{\l}},
  TITLE = {Topological Properties of Subsets in Real Numbers},
  NOTE = {Supported by RPBP.III-24.C8.},
  DAY = {18},
  MONTH = {June},
  YEAR = {1990},
  ADDRESS1 = {Warsaw University\\Bia{\l}ystok},
  ADDRESS2 = {Warsaw University\\Bia{\l}ystok},
  SUMMARY = {The following notions for real subsets are defined: open set, closed set,
compact set, intervals and neighbourhoods. In the sequel some theorems
involving above mentioned notions are proved.}}

