
arXiv: 1904.04463
We construct two connected plane sets which can be embedded into rational curves. The first is a biconnected set with a dispersion point. It answers a question of Joachim Grispolakis. The second is indecomposable. Both examples are completely metrizable.
10 pages
Extensions of spaces (compactifications, supercompactifications, completions, etc.), 54F50, 54F15, 54D35, 54G20, Continua and generalizations, Counterexamples in general topology, General Topology (math.GN), FOS: Mathematics, Dimension theory in general topology, Mathematics - General Topology
Extensions of spaces (compactifications, supercompactifications, completions, etc.), 54F50, 54F15, 54D35, 54G20, Continua and generalizations, Counterexamples in general topology, General Topology (math.GN), FOS: Mathematics, Dimension theory in general topology, Mathematics - General Topology
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