When is a -space?
Dorota Krassowska, Wiesƚaw Śliwa (1992)
Commentationes Mathematicae Universitatis Carolinae
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Let be a Hausdorff locally convex space. Either or is a -space iff is of finite dimension (THEOREM). This is the most general solution of the problem studied by Iyahen [2] and Radenovič [3].