A sharp point on a curve. A point on a curve with two tangents. A point on a curve where the second derivative is discontinuous.

None of these definitions mathematically is totally satisfactory however a proper definition can be found at:

http://en.wikipedia.org/wiki/Cusp (Singularity)

Last change to this page
Full Page history
Links to this page
Edit this page
  (with sufficient authority)
Change password
Recent changes
All pages