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Umbilical point

An umbilical point of a surface is a point where the two principal curvatures are equal, equivalently where the shape operator is a scalar multiple of the identity.

Ancestors (9)

  1. Principal curvature
  2. Shape operator
  3. Second fundamental form
  4. Gauss map
  5. Differential geometry
  6. Geometry and topology
  7. Area of mathematics
  8. Mathematics
  9. Home

Incoming links (2)