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Σ -products of paracompact Čech-scattered spaces

Hidenori Tanaka — 2006

Commentationes Mathematicae Universitatis Carolinae

In this paper, we shall discuss Σ -products of paracompact Čech-scattered spaces and show the following: (1) Let Σ be a Σ -product of paracompact Čech-scattered spaces. If Σ has countable tightness, then it is collectionwise normal. (2) If Σ is a Σ -product of first countable, paracompact (subparacompact) Čech-scattered spaces, then it is shrinking (subshrinking).

Covering properties in countable products, II

Sachio HiguchiHidenori Tanaka — 2006

Commentationes Mathematicae Universitatis Carolinae

In this paper, we discuss covering properties in countable products of Čech-scattered spaces and prove the following: (1) If Y is a perfect subparacompact space and { X n : n ω } is a countable collection of subparacompact Čech-scattered spaces, then the product Y × n ω X n is subparacompact and (2) If { X n : n ω } is a countable collection of metacompact Čech-scattered spaces, then the product n ω X n is metacompact.

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