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1.5.12 Integral Transforms

LaplaceTransform[expr, t, s] find the Laplace transform of expr
InverseLaplaceTransform[expr, s, t]
find the inverse Laplace transform of expr

Laplace transforms.
This computes a Laplace transform.

In[1]:=  LaplaceTransform[t^3 Exp[a t], t, s]

Out[1]=

Here is the inverse transform.

In[2]:=  InverseLaplaceTransform[%, s, t]

Out[2]=

FourierTransform[expr, t, w] find the symbolic Fourier transform of expr
InverseFourierTransform[expr, w, t]
find the inverse Fourier transform of expr

Fourier transforms.
This computes a Fourier transform.

In[3]:=  FourierTransform[t^4 Exp[-t^2], t, w]

Out[3]=

Here is the inverse transform.

In[4]:=  InverseFourierTransform[%, w, t]

Out[4]=

Note that in the scientific and technical literature many different conventions are used for defining Fourier transforms. Section 3.8.4 describes the setup in Mathematica.


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