Reaping number and ฯ-character of Boolea
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Bohuslav Balcar; Petr Simon
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Article
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1992
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Elsevier Science
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English
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Balcar, B. and P. Simon, Reaping number and n-character of Boolean algebras, Discrete Mathematics 108 (1992) 5-12. For every Boolean algebra B the minimal n-character of an ultrafilter on B is at most 2",