TABLE I.
Curvature classification based on principal curvature values k1,2.
| Class | Shape | H | k1,2 | K |
|---|---|---|---|---|
| Elliptic | Pit | >0 | Same sign | >0 |
| Elliptic | Peak | <0 | Same sign | >0 |
| Hyperbolic | Saddle | Varies | Opposite sign | <0 |
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