摘要: Abstract : Motivated by the well known notions from probability and logic, author says that a family of n simple closed curves (A sub 1),...,(A n) in Euclidean plane is independent provided intersection (*) (X 1)(X 2)...(X non-empty whenever each set j) either interior or else exterior j). An Venn diagram if connected. These are examined point view combinatorial geometry several results obtained; some them correct erroneous assertion found literature. (Modified abstract)
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