Amie Wilkinson
the configuration space of two unmarked (same color) points on the circle is a Möbius band, which is covered by the cylinder, the configuration space of two marked (differently colored) points

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seen from United States

seen from United States

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seen from United States

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seen from United States
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seen from Türkiye
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seen from Malaysia
seen from United States
seen from China

seen from United States
seen from United States

seen from United States
Amie Wilkinson
the configuration space of two unmarked (same color) points on the circle is a Möbius band, which is covered by the cylinder, the configuration space of two marked (differently colored) points