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Umbilic Point |
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Umbilic Point
An umbilic point on a surface is a point where all normal sections have the same nonzero curvature. A three-axis ellipsoid has four umbilic points, namely, the points of contact between the ellipsoid and planes parallel to planes that intersect the ellipsoid in circles. The only surface on which all points are umbilic is the sphere. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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