Mathematics – General Topology
Scientific paper
2010-02-12
Mathematics
General Topology
17 pages, corrected, restructured and extended with a stronger result
Scientific paper
Under $(\diamondsuit^*)$ we construct a locally countable, locally compact,
0-dimensional $T_2$ space $X$ of size $\omg$ which is aD however not even
linearly D. This consistently answers a question of Arhangel'skii, whether aD
implies D. Furthermore we answer two problems concerning characterization of
linearly D-spaces, raised by Guo and Junnila.
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