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  2. Smoothness - Wikipedia

    en.wikipedia.org/wiki/Smoothness

    A bump function is a smooth function with compact support.. In mathematical analysis, the smoothness of a function is a property measured by the number of continuous derivatives (differentiability class) it has over its domain.

  3. C2 - Wikipedia

    en.wikipedia.org/wiki/C2

    C2 or a derivative (C-2, C 2, etc.) may refer to: Mathematics and physics. C 2, one of the common notations for the cyclic group of order 2; C 2 differentiability class;

  4. Spline (mathematics) - Wikipedia

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

    A cubic spline has degree 3 with continuity C 2, i.e. the values and first and second derivatives are continuous. Natural means that the second derivatives of the spline polynomials are zero at the endpoints of the interval of interpolation. ″ = ″ =

  5. Symmetry of second derivatives - Wikipedia

    en.wikipedia.org/wiki/Symmetry_of_second_derivatives

    The derivative of an integrable function can always be defined as a distribution, and symmetry of mixed partial derivatives always holds as an equality of distributions. The use of formal integration by parts to define differentiation of distributions puts the symmetry question back onto the test functions , which are smooth and certainly ...

  6. Command and control - Wikipedia

    en.wikipedia.org/wiki/Command_and_control

    Command and control (abbr. C2) is a "set of organizational and technical attributes and processes ...[that] employs human, physical, and information resources to solve problems and accomplish missions" to achieve the goals of an organization or enterprise, according to a 2015 definition by military scientists Marius Vassiliou, David S. Alberts, and Jonathan R. Agre.

  7. Derivative - Wikipedia

    en.wikipedia.org/wiki/Derivative

    In mathematics, the derivative is a fundamental tool that quantifies the sensitivity to change of a function's output with respect to its input. The derivative of a function of a single variable at a chosen input value, when it exists, is the slope of the tangent line to the graph of the function at that point.

  8. Differentiable manifold - Wikipedia

    en.wikipedia.org/wiki/Differentiable_manifold

    There are various ways to define the derivative of a function on a differentiable manifold, the most fundamental of which is the directional derivative. The definition of the directional derivative is complicated by the fact that a manifold will lack a suitable affine structure with which to define vectors. Therefore, the directional derivative ...

  9. Continuous function - Wikipedia

    en.wikipedia.org/wiki/Continuous_function

    Explicitly including the definition of the limit of a function, we obtain a self-contained definition: Given a function : as above and an element of the domain , is said to be continuous at the point when the following holds: For any positive real number >, however small, there exists some positive real number > such that for all in the domain ...