An example is the center of a hyperbolic paraboloid, since restricting the graph to one plane makes the center a maximum, while restricting the graph to a second plane makes the center a minimum.
Given a function f of two variables x and y, these may be found by finding points such that the square of fxy ["f sub ecks why"] is greater than the product of fxx ["eff sub ecks ecks"] and fyy ["eff sub why why"]. An example is the center of a hyperbolic paraboloid, since restricting the graph to one plane makes the center a maximum, while restricting the graph to a second plane makes the center a minimum. They may be defined as critical points that are not local extrema. For ten points, what are these points named because their graphs in 3-space often resemble a piece of equipment used to ride a horse?
Given a function f of two variables x and y, these may be found by finding points such that the square of fxy ["f sub ecks why"] is greater than the product of fxx ["eff sub ecks ecks"] and fyy ["eff sub why why"].
saddle points