Post #1209913
2026-03-16 19:05 UTC
@robinhouston doesn't the Japanese flag also have this property?
Replies (1)
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@robinhouston@mathstodon.xyz 2026-03-16 19:26
@alexdbolton They specifically mean it should have *only* rotational symmetry of order 2, and no other symmetry. There are many flags that have rotational symmetry of order 2, but most of them have reflection symmetry as well.