# Integral/Related Articles

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< Integral

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- An elementary proof that 22 over 7 exceeds π [r]:
*Add brief definition or description* - Calculus [r]: The elementary study of real (or complex) functions involving derivatives and integration.
^{[e]} - Complex analysis [r]: Field of mathematics, precisely of mathematical analysis, that studies those properties which characterize functions of complex variables.
^{[e]} - Computer algebra system [r]: Software program enabling manipulation of mathematical expressions in symbolic form.
^{[e]} - Derivative [r]: The rate of change of a function with respect to its argument.
^{[e]} - Enthalpy [r]: Energy function of thermodynamic system equal to internal energy plus
*pV*(pressure times volume).^{[e]} - Entire function [r]: is a function that is holomorphic in the whole complex plane.
^{[e]} - Finite and infinite [r]: The distinction between
*bounded*and*unbounded*in size (number of elements, length, area, etc.)^{[e]} - Gamma function [r]: A mathematical function that extends the domain of factorials to non-integers.
^{[e]} - Jacobian [r]: Determinant of the matrix whose ith row lists all the first-order partial derivatives of the function ƒi(x1, x2, …, xn).
^{[e]} - Lambert W function [r]: Used to solve equations in which the unknown appears both outside and inside an exponential function or a logarithm.
^{[e]} - Measure (mathematics) [r]: Systematic way to assign to each suitable subset a number, intuitively interpreted as the size of the subset.
^{[e]} - Series (mathematics) [r]: A sequence of numbers defined by the partial sums of another infinite sequence.
^{[e]} - Sine [r]: In a right triangle, the ratio of the length of the side opposite an acute angle (less than 90 degrees) and the length of the hypotenuse.
^{[e]} - Trigonometric function [r]: Function of an angle expressed as the ratio of two of the sides of a right triangle that contains that angle; the sine, cosine, tangent, cotangent, secant, and cosecant.
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