Elliptic point: Difference between revisions
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Latest revision as of 19:39, 18 May 2008
Template:Point property on regular surface
Definition
A point on a regular surface is termed an elliptic point if it satisfies the following equivalent conditions:
- Both its principal curvatures have the same sign
- Its Gaussian curvature is positive
Relation with other properties
Stronger properties
- Umbilic point (except when its flat at the point)