The saddle point, the standing point, the inflection point and the extreme points in mathematics

http://zh.wikipedia.org/wiki/Saddle Dot

http://zh.wikipedia.org/wiki/Inflection point

The standing point is a point with a derivative of 0.

Inflection point is the one-order derivative of 0

The extremum point is a point with a second derivative of 0

The inflection point can be classified according to F '(x) zero or nonzero.

• If F '(x) is zero, this point is the standing point of the inflection point, which is referred to as the saddle .

• If F '(x) is nonzero, this point is the non-resident point of the inflection .

The saddle point, the standing point, the inflection point and the extreme points in mathematics