## 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)