Integral transform
In mathematics, an integral transform is any transform T of the following form:
Related Topics:
Mathematics - Transform
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: (Tf)(u) = int_{t_1}^{t_2} f(t), K(t, u), dt.
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The input of this transform is a function f, and the output is another function Tf.
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There are several useful integral transforms.
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Each transform corresponds to a different choice of the function K, which is called the kernel of the transform.
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Table of Integral Transforms
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TransformSymbolKernelt1t2
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mathcal{F}
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rac{e^{iut}}{sqrt{2 pi}}
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-infty,infty,
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mathcal{M}
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t^{u-1},
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0,infty,
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mathcal{B}
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e^{-ut},
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-infty,infty,
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mathcal{L}
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e^{-ut},
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0,infty,
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t,J_ u(ut)
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0,infty,
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rac{t}{sqrt{t^2-u^2}}
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u,infty,
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mathcal{H}
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rac{1}{pi}rac{1}{u-t}
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-infty,infty,
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delta (u-t),
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t_1u,
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Although the properties of integral transforms vary widely,
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they have some properties in common.
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For example, every integral transform is a linear operator,
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since the integral is a linear operator, and in fact if the kernel is allowed to be a generalized function then all linear operators are integral transforms (a properly formulated version of this statement is the Schwartz kernel theorem).
Related Topics:
Generalized function - Schwartz kernel theorem
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