Critical point (mathematics) In mathematics, a critical point or stationary point of a differentiable function of a real or complex variable is any value in its domain where its derivative is 0 or undefined. For a differentiable... Critical point (mathematics) - Wikipedia
 Critical point (mathematics) - Wikipedia
 Critical point (set theory) In set theory, the critical point of an elementary embedding of a transitive class into another transitive class is the smallest ordinal which is not mapped to itself.Suppose that j : N → M is an...
 Maxima and minima In mathematics, the maximum and minimum (plural: maxima and minima) of a function, known collectively as extrema (singular: extremum), are the largest and smallest value that the function takes at a p...
 Second partial derivative test In mathematics, the second partial derivative test is a method in multivariable calculus used to determine if a critical point of a function is a local minimum, maximum or saddle point.Suppose th... Second partial derivative test - Wikipedia