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scottclosed

Source : Free On-Line Dictionary of Computing

Scott-closed
     
        A set S, a subset of D, is Scott-closed if
     
        (1) If Y is a subset of S and Y is {directed} then lub Y is in
        S and
     
        (2) If y <= s in S then y is in S.
     
        I.e. a Scott-closed set contains the {lub}s of its {directed}
        subsets and anything less than any element.  (2) says that S
        is downward {closed} (or left closed).
     
        ("<=" is written in {LaTeX} as {\sqsubseteq}).
     
        (1995-02-03)
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