Contact Between Curves
Two curves in the plane intersecting at a point p are said to have:
- 1-point contact if the curves have a simple crossing (not tangent).
- 2-point contact if the two curves are tangent.
- 3-point contact if the curvatures of the curves are equal. Such curves are said to be osculating.
- 4-point contact if the derivatives of the curvature are equal.
- 5-point contact if the second derivatives of the curvature are equal.
Read more about this topic: Contact (mathematics)
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