@MISC{RLAFFIN2.MIZ,
  AUTHOR = {P\c{a}k, Karol},
  TITLE = {The Geometric Interior in Real Linear Spaces},
  SECTION1 = {Preliminaries},
  SECTION2 = {The Geometric Interior},
  SECTION3 = {The Centre of Mass},
  DAY = {9},
  MONTH = {February},
  YEAR = {2010},
  ADDRESS1 = {University of Bialystok, ul. Akademicka 2, 15-267 Bialystok},
  SUMMARY = {We introduce the notions of the geometric interior and
       the centre of mass for subsets of real linear spaces. We prove a number
       of theorems concerning these notions which are used in the theory of
       abstract simplicial complexes.}}
