What is Inflection point?
[[Image:Animated illustration of inflection point.gif|500px|thumb|Blue is convex, red is an inflection point, and green is concave.]] [[Image:X to the 4th minus x.svg|220px|thumb|Point (0,0) is an undulation point.]] An '''inflection point''' is a [[Point (geometry)|point]] on a [[curve]] where the curve changes from being [[Concave function|concave]] (going up, then down) to [[Convex function|convex]] (going down, then up), or the other way around. An '''undulation point''' is like an inflection point but the type of curve doesn't change. [[Category:Geometry]] [[Category:Differential geometry]] [[Category:Calculus]] {{stub}}