Five-fold Ringworm
This negative-curvature surface is based on forms seen in polyclad flatworms. These sea creatures are not ring shaped, but this sculpture is an imagining of a five-fold ring of such curved surfaces. This object also has two-fold symmetry axes orthogonal to the five-fold axis and mirror planes that contain the five-fold axis. The piece belongs to the spherical symmetry group 2*5.
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$900