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  2. Integral - Wikipedia

    en.wikipedia.org/wiki/Integral

    In mathematics, an integral is the continuous analog of a sum, which is used to calculate areas, volumes, and their generalizations. Integration, the process of computing an integral, is one of the two fundamental operations of calculus, [a] the other being differentiation. Integration was initially used to solve problems in mathematics and ...

  3. Numerical integration - Wikipedia

    en.wikipedia.org/wiki/Numerical_integration

    e. In analysis, numerical integration comprises a broad family of algorithms for calculating the numerical value of a definite integral . The term numerical quadrature (often abbreviated to quadrature) is more or less a synonym for "numerical integration", especially as applied to one-dimensional integrals.

  4. Trigonometric integral - Wikipedia

    en.wikipedia.org/wiki/Trigonometric_integral

    Trigonometric integral. Plot of the hyperbolic sine integral function Shi (z) in the complex plane from -2-2i to 2+2i with colors created with Mathematica 13.1 function ComplexPlot3D. Si ( x) (blue) and Ci ( x) (green) plotted on the same plot. Integral sine in the complex plane, plotted with a variant of domain coloring.

  5. Constant of integration - Wikipedia

    en.wikipedia.org/wiki/Constant_of_integration

    Constant of integration. In calculus, the constant of integration, often denoted by (or ), is a constant term added to an antiderivative of a function to indicate that the indefinite integral of (i.e., the set of all antiderivatives of ), on a connected domain, is only defined up to an additive constant. [1] [2] [3] This constant expresses an ...

  6. Integration by substitution - Wikipedia

    en.wikipedia.org/wiki/Integration_by_substitution

    Calculus. In calculus, integration by substitution, also known as u-substitution, reverse chain rule or change of variables, [1] is a method for evaluating integrals and antiderivatives. It is the counterpart to the chain rule for differentiation, and can loosely be thought of as using the chain rule "backwards."

  7. Integral equation - Wikipedia

    en.wikipedia.org/wiki/Integral_equation

    Integral equation. For equations of integer unknowns, see Diophantine equation. In mathematics, integral equations are equations in which an unknown function appears under an integral sign. [1] In mathematical notation, integral equations may thus be expressed as being of the form: where is an integral operator acting on u. [1]

  8. Lists of integrals - Wikipedia

    en.wikipedia.org/wiki/Lists_of_integrals

    Integration is the basic operation in integral calculus.While differentiation has straightforward rules by which the derivative of a complicated function can be found by differentiating its simpler component functions, integration does not, so tables of known integrals are often useful.

  9. Fresnel integral - Wikipedia

    en.wikipedia.org/wiki/Fresnel_integral

    Generalization. The integral. is a confluent hypergeometric function and also an incomplete gamma function [6] which reduces to Fresnel integrals if real or imaginary parts are taken: The leading term in the asymptotic expansion is and therefore. For m = 0, the imaginary part of this equation in particular is.

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