Note the nipple points and the cleve point.
In mathematics, a saddle point is a point in the domain of a function that is a stationary point but not a local extremum. The name derives from the fact that the prototypical example in two dimensions is a surface that curves up in one direction, and curves down in a different direction, resembling a saddle or a mountain pass. In terms of contour lines, a saddle point in two dimensions gives rise to a contour that appears to intersect itself.
Read more about Saddle Point: Mathematical Discussion, Other Uses
Famous quotes containing the words saddle and/or point:
“It is beautiful to remember that he passed away as he wished, in the saddle riding hard.”
—Lyndon Baines Johnson (1908–1973)
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—Mark Hanna. Nathan Hertz. Dr. Von Loeb (Otto Waldis)