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)
“The women’s liberation movement at this point in history makes the American Communist Party of the 1930s look like a monolith.”
—Nora Ephron (b. 1941)