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  2. Inflection point - Wikipedia

    en.wikipedia.org/wiki/Inflection_point

    An example of a stationary point of inflection is the point (0, 0) on the graph of y = x 3. The tangent is the x-axis, which cuts the graph at this point. An example of a non-stationary point of inflection is the point (0, 0) on the graph of y = x 3 + ax, for any nonzero a. The tangent at the origin is the line y = ax, which cuts the graph at ...

  3. Cubic function - Wikipedia

    en.wikipedia.org/wiki/Cubic_function

    See the figure for an example of the case Δ 0 > 0. The inflection point of a function is where that function changes concavity. [3] An inflection point occurs when the second derivative ″ = +, is zero, and the third derivative is nonzero. Thus a cubic function has always a single inflection point, which occurs at

  4. Sigmoid function - Wikipedia

    en.wikipedia.org/wiki/Sigmoid_function

    A sigmoid function is any mathematical function whose graph has a characteristic S-shaped or sigmoid curve. A common example of a sigmoid function is the logistic function, which is defined by the formula: [1] = + = + = ().

  5. Critical point (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Critical_point_(mathematics)

    The x-coordinates of the red circles are stationary points; the blue squares are inflection points. In mathematics, a critical point is the argument of a function where the function derivative is zero (or undefined, as specified below). The value of the function at a critical point is a critical value. [1]

  6. Curve fitting - Wikipedia

    en.wikipedia.org/wiki/Curve_fitting

    Low-order polynomials tend to be smooth and high order polynomial curves tend to be "lumpy". To define this more precisely, the maximum number of inflection points possible in a polynomial curve is n-2, where n is the order of the polynomial equation. An inflection point is a location on the curve where it switches from a positive radius to ...

  7. Stationary point - Wikipedia

    en.wikipedia.org/wiki/Stationary_point

    The stationary points are the red circles. In this graph, they are all relative maxima or relative minima. The blue squares are inflection points.. In mathematics, particularly in calculus, a stationary point of a differentiable function of one variable is a point on the graph of the function where the function's derivative is zero.

  8. File:Cubic graph special points.svg - Wikipedia

    en.wikipedia.org/wiki/File:Cubic_graph_special...

    English: Graph showing the relationship between the roots, turning or stationary points and inflection point of a cubic polynomial and its first and second derivatives. The vertical scale is compressed 1:50 relative to the horizontal scale for ease of viewing.

  9. Gompertz function - Wikipedia

    en.wikipedia.org/wiki/Gompertz_function

    Examples of uses for Gompertz curves include: ... In addition, there is an inflection point in the graph of the generalized logistic function when = ...