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SELECTION PRINCIPLES IN TOPOLOGY Doctoral dissertation by Liljana Babinkostova
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HISTORY E. Borel 1919 Strong Measure Zero metric spaces K. Menger 1924 Sequential property of bases of metric spaces W. Hurewicz 1925 F.P. Ramsey 1930 Ramsey's Theorem F. Rothberger 1938 R.H.Bing 1951 Screenability
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HISTORY F. Galvin 1971 R. Telgarsky 1975 J. Pawlikovski 1994, Lj.Kocinac 1998 Star-selection principles M.Scheepers 2000 Groupability
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Standard themes
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Examples:
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General Implications
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Star selection principles
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X is a Tychonoff space Y is a subspace of X f is a continuous function Assumptions
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The sequence selection property
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Countable fan tightness
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Countable strong fan tightness
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Strongly Frechet function
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(X,d) is a metric space Y is a subspace of X Y is a subspace of X Assumptions:
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Relative Menger basis property
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Relative Hurewicz basis property
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Relative Scheepers basis property
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Relative Rothberger basis property
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( X,d) is a zerodimensional metric space Y is a subspace of X Y is a subspace of X Assumptions:
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Relative Menger measure zero
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Relative Hurewicz measure zero
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Relative Scheepers measure zero
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http://iunona.pmf.ukim.edu.mk/~spm S P M
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