Three countable connected spaces
A note on countable connected locally connected Urysohn almost regular spaces
Two countable, biconnected, not widely connected Hausdorff spaces.
On countable connected Hausdorff spaces in which the intersection of every pair of connected subsets is connected.
A note on maximally resolvable spaces.
Two countable Hausdorff almost regular spaces every continuous map of which into every Urysohn space is constant.
A Tychonoff non-normal space.
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