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Some types of points in \(N^*\). (English) Zbl 0566.54011
The author announces the following results: (1) There are \(2^ c\) matrix points in \(N^*\), (2) if x is a strict R-point in \(N^*\) then \(N^*\setminus \{x\}\) is not normal (each matrix point is a strict R- point), and (3) there are \(2^ c\) 0-points in \(N^*\).
Reviewer: J.van Mill
MSC:
54D35 Extensions of spaces (compactifications, supercompactifications, completions, etc.)
54A25 Cardinality properties (cardinal functions and inequalities, discrete subsets)
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