Central Symmetry
Recall the notion of central symmetry: a Euclidean polyhedron is called centrally symmetric if it is invariant under the antipodal map
Thus, in the plane central symmetry is the rotation by 180 degrees. For example, an ellipse is centrally symmetric, as is any ellipsoid in 3-space.
Read more about this topic: Introduction To Systolic Geometry
Famous quotes containing the words central and/or symmetry:
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—Ralph Waldo Emerson (1803–1882)
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—George Gordon Noel Byron (1788–1824)